Factorise 3x²+5x-12
Show working out

Answers

Answer 1

hi <3

i'm not sure of which method you will have been taught but i'll try to explain the method i was shown.

so, you need to multiply the coefficient of x^2 by the last value

3 x -12 = -36

now, you need to find two values that multiply to make -36 but add to make 5.

9 and 4 would work. it would have to be positive 9 and negative 4, as these would subtract to give the 5 that you need

now we have:

(x - 4)(x + 9)

however, we need to achieve the 3 from somewhere so it needs to be divided somewhere

9 is divisible by 3 so you can divide it there. as 4 cannot divide by 3, you would move the 3 up to be the coefficient.

thus, your final answer would be:

(3x - 4)(x + 3)

hope this helps :)

Answer 2

Answer:

it's gonna be 3(X*2 + 4X - 4)

Step-by-step explanation:

Just factor out 3 from the expression


Related Questions

What 124.2÷9 step-by-step explanation please help !! ( long division ..”

Answers

Answer: 13.8

Step-by-step explanation:

A 100 ftladder leans against a building. When the angle of elevation of the ladder is 81 degrees, how high up the building will the ladder reach?

Answers

Answer:

I am not to sure but i think a.

Step-by-step explanation:

I really don’t know but I hope this helps

Simplify the following expression:

2x − 8y + 3x2 + 7y − 12x

Question options:

3x2 − 14x − y


3x2 − 10x − y


3x2 − 10x − 15y


3x2 + 10x − y

Answers

Answer:

2nd option

Step-by-step explanation:

Given

2x - 8y + 3x² + 7y - 12x ← collect like terms

= 3x² + (2x - 12x) + (- 8y + 7y)

= 3x² + (- 10x) + (- y)

= 3x² - 10x - y

(please help!)
Add −1.25+2.5

Plot the first addend and the sum on the number.

Answers

Answer:

the answer of this question is 1.25

-1.25+2.5 = 1.25.
___

I need help on the question up here

Answers

2x + 4a = 10

2x = 10 - 4a

x = 5 - 2a

I will give you brainliest and points like 100.

5 of the students in Lena's class have been in ballet and 9 have been in a play. 2 students have been both in ballet and in a play. How many students have been in ballet but not in a play?

Answers

Answer:

3 have only been in ballet

Step-by-step explanation:

If

5 have been in ballet

9 have been in play

2 have been in both ballet and a play

Then

3 have only been in ballet

7 have only been in a play

Answer:

4 students

Step-by-step explanation:

add 2 + 5 = 7

add 9 + 2 = 11

subtract 11 - 7 = 4

there was 2 students added to the 5 students, there was 2 students added to the 9 students/ Sorry if incorrect, i worked it out 4 times.

Solve each equation. Be sure to check for extraneous solutions 53=5|p-4|+8

Answers

53=5p+28
Got answer from the lord

if f(x)=4x-5 what is the value of f(2)

Answers

▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

Value of Polynomial :

The value of a polynomial p(x) or f(x) at x = α is obtained by putting x = α in p(x) or f(x) and it is denoted by p(α) ...!

Required Solution :

Let f(x) = 4x - 5

⇒f(2) = 4(2) - 5

= 4 × 2 - 5

= 8 - 5

= 3

Hence, If f(x) = 4x-5 then the value of f(2) will be 3 ...!

▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄

Answer:

f(2) = 3

Step-by-step explanation:

f(x) = 4x-5f(2) = (4×2)-5f(2) = 8-5f(2) = 3

HOPE THIS HELPS YOU......

-3+x=-8 what is the answer

Answers

Answer:

x=-5

Step-by-step explanation:

add 3 to -8

1 Regroup terms.

x-3=-8

x−3=−8

2 Add 33 to both sides.

x=-8+3

x=−8+3

3 Simplify  -8+3−8+3  to  -5−5.

x=-5

x=−5

Answer: x=−5

10 times the quantity 9 minus a number x

Answers

Answer:

[tex]10 \times 9 - x \\ x = 10 \times 9 \\ x = 90[/tex]

PLEASE MARK ME BRAINLIEST.

using the distributive property and gcf determine which of the following expressions is equivalent to: 24+32​

Answers

Answer:

GCF is 8

32x - 24 = 8(4x - 3)

Step-by-step explanation:

plz help me!!!!!!!!!!​

Answers

check solution. d) 22
e) 50, 130
f) 135, 15

How many integers have absolute value equal to 3

Answers

Answer:

There are 2 integers, which absolute value are 3. -3 and 3 itself

Step-by-step explanation:

|-3| = 3 and |3| = 3 to

Answer:

2 integers at a time will be able to have the same absolute value. This is because integer can be both positive and negative, while absolute value always remains positive:

The absolute value of both 2 and (-2) is 2.

Inga is playing poker with some friends.

Let p represent the statement "Inga has two aces in her hand." Let q represent the statement "Inga has a full house." [Note, a "full house" is a specific type of hand in the game of poker.]

Which symbolic form represents the English sentence "Inga has either two aces in her hand or she has a full house."?

Group of answer choices

Answers

Symbolic form involves using symbols to represent statements. The symbolic form of the given sentence is p v q

Given that:

[tex]p \to[/tex] "Inga has two aces in her hand."

[tex]q \to[/tex] "Inga has a full house."

The given sentence "Inga has either two aces in her hand or she has a full house." can be represented as:

Either p or q

In symbolic form, either/or is represented as: v

So, the representation of either p or q is: p v q

Read more about symbolic forms at:

https://brainly.com/question/17042406

Need help with #12
Please help

Answers

Step-by-step explanation:

If the figure is triangle then,

Let PR be x

So,

PQ+QR+PR= 180 (Sum of all the angles of the triangle)

Therefore,

6x+25+16-3x+x=180

4x+36=180

4x= 180/36

x= 144/4

X= 36

NOW,

PQ= 6x+25

= 6(36)+25

= 216+25 = 241= PQ.

QR = 16-3x

= 16-3(36)

= 16-108

= -92

PR = 36

hope it helps

Answer:

PR = 36

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

The spinner below shows 10 equally sized slices. Lisa spun the dial 1000 times and got the following results.

Answers

Answer:

where are the results

Step-by-step explanation:

Please help me TwT....Tell whether the statement is always, sometimes, or never true. The LCM of a set of numbers is equal to one of the numbers in the set. PLEASE HELP!!!

Answers

Answer:always

Step-by-step explanation:the lcm should always be included in the set. Like think about 2s and 3s the lcm will be 6 that is included. unless there is an exception I don’t know the lcm should always be included in the set

Spider-Man worked 0.75 hour on math, 0.675 hour on writing, and 0.25 hour each on science and social studies. How many hours did he work in all?

Answers

Answer:

1.675

Step-by-step explanation:

Answer:

The answer is spider man work 1.675 hours

Step-by-step explanation:

0.75+0.675+0.25=1.675

Use partial products and the distributive property to calculate the product. Use paper to show your work.

​ 300\times 41.9300×41.9

Answers

Answer:

22054.36

Step-by-step explanation:

Evaluate 3x when x = -8.

Answers

x = -8

3x = 3 · (-8) = -24

.......

the quotient of five times a number 7 is no more than 10​

Answers

Answer:

[tex]x \ge3.5[/tex]

Step-by-step explanation:

First, write the given in the form of a mathematical equation rather than words. I'll call the mystery number given in the question [tex]x[/tex]:

[tex]\frac{5*7}{x} \leq 10[/tex]

Simplify:

[tex]\frac{35}{x} \leq 10[/tex]

Solve for x:

[tex]\frac{35}{x} *x\leq 10*x[/tex]

Simplify the fraction:

[tex]35\leq 10x[/tex]

Divide by 10 to isolate x:

[tex]\frac{35}{10} \leq x[/tex]

Flip the equation around to make it easier to read:

[tex]x \ge \frac{35}{10}[/tex]

Simplify the fraction:

[tex]x \ge \frac{7}{2}[/tex] or [tex]x \ge3.5[/tex]

What is the missing number?
7/18= 21/?
A.3
B.32
C.44
D.54

Answers

Answer:

7x3=21

18x3=54.

Hope it helps you...

Answer:

D 0.54

Step-by-step explanation:

7/18 = 0.389

21/0.54 = 0.389

Use a calculator to if you're unsure or want to double check. (PS. I used it)

Hope it helped! Don't forget to give it 5 stars and leave a comment below if it helped! Thanks!

Cameron has a bag that contains one silver (S) and one gold (G) marble. The marbles are the same size. Cameron chooses one marble at random and then puts it back in the bag. Then he chooses a second marble. The outcome "GS" means that a gold marble was chosen first and a silver marble was chosen second.

Answers

Answer:

(SS,SG,GS,GG) Probability 0.25

Step-by-step explanation:

i don't know how to do this

Heyo!

So, first things first:

Based on the data shown, it appears that Cameron has 1/4 a chance to really recieve any combo of the following. Hence, he can get SS, SG, 6S, GG. So, each chance he picks, he has a 0.25 chance of probably recieving any of the combo. So, the outcome order is (SS, SG, GS, GG) and the probability for each is 0.25.

It hard to really describe how to write it out without an image, but I hope this helps! Pls, lmk if it does! Good luck!

Please help! What is |x-3|=9

Answers

Answer:

x = 12 or x = -6

Step-by-step explanation:

Solve for x over the integers:

abs(x - 3) = 9

Split the equation into two possible cases:

x - 3 = 9 or x - 3 = -9

Add 3 to both sides:

x = 12 or x - 3 = -9

Add 3 to both sides:

Answer: x = 12 or x = -6

Pls help I’m so confused

Answers

[tex]5x-6-x=2x+2\\\\5x-x-2x=2+6\\\\2x=8 \ \ /:2\\\\x=4\\\\\huge\boxed{\text{There is one solution at x=4}}[/tex]

Answer:

There is one solution at x+4

Step-by-step explanation:

-0.58x+0.38x=4.8
plz help quick

Answers

Answer:

-0.2x=40

Step-by-step explanation:

-0.58x+0.38x=4.8

Combine like terms:

-0.2x=4.8

That’s for the answer, but if you want to go further, divide -0.2 to both sides:

x=24

HELPPP?!!! What is the value of f(-2) and f(3)

Answers

Step #1 for both: figure out which interval your x-value fits into.
For f(-2), x=-2 and -2 fits with x ≤ -2, the top interval.
For f(3), x=3 and 3 fits into -2 < x ≤ 3, the middle interval.

Step #2 for both, plug in your x-value to the piece of the function that fits with that interval.
For f(-2), we know x≤-2, so we use 2x+8 to evaluate x=-2.
For f(3), we know -2
f(-2) = 2(-2)+8 = -4+8 = 4

f(3) = (3)^2 -3 = 9-3 = 6

Hanks pickup can travel 45 miles on 3 gallons of gas. How many gallons will Hanks pickup need to travel 30 miles?

Answers

2 gallons because 45/3=15 30/15=2

We have an algebra problem.

We will find that Hank's pickup needs 2 gallons of gas to travel 30 miles.

The information given is:

The pickup can travel 45 miles on 3 gallons of gas.

To find the number of miles that the pickup can travel per gallon of gas, we need to find the quotient between the amount that he travels (45 miles) and the amount of gas that he uses (3 gallons)

This is:

r = (45 miles)/(3 gallons) = 15 miles/gallon.

Now that we know this, the number of gallons needed to travel 30 miles is given by:

N = (30 miles)/(15 miles/gallon) = 2 gallons.

N = 2 gallons.

The pickup needs 2 gallons to travel 30 miles.

If you want to learn more, you can read:

https://brainly.com/question/926748

Helpppppppppppppppppppp

Answers

Step-by-step explanation:

could you write it clearly pls !!!

Answer:

s = 3/10

Step-by-step explanation:

-S - 5st =0

S = 3

t = -2

-3 - 5 (-2) s =0

10 s = 3

s = 3/10

-120 = -8x what is x ?

Answers

Answer:

- 15 is your answer.

I hope it will help you a lot.

Answer: x=15

Step-by-step explanation: −120=−8x                                                                     −8x /−8 = −120 /−8                                                                                                         x=15                                  

               

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