3 years ago

How do I solve 12x^2-89x-56 factor by grouping

1 answer:

7 0

Use ac method

multiply 12 and -56
-672
now find what 2 factors of -672 add to -89
answer is -96 and 7

expand the middle term like that
12x²-96x+7x-56
group
(12x²-96x)+(7x-56)
factor
12x(x-8)+7(x-8)
undistribute the (x-8)
(x-8)(12x+7) is answer

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3 years ago

Which represents the solution set of 5(x+5) < 85?

Maru [420]

Answer:

$\Huge \boxed{X$

Step-by-step explanation:

To solve this problem, first you have to isolate it on one side of the equation. Remember to solve this problem, find represents the solution of 5(x+5)<85.

First, you divide by 5 from both sides.

$\displaystyle \frac{5(x+5)}{5}$