Question

Simplify completely and find the restrictions on the variable.

Answer 1

so the first step is to factor the bottom, and then take the gcf out of the top.

Answer 2

\[\frac{ 12x+36 }{ x^2-4x-21 }\]

Answer 3

how do i factor the bottom?

Answer 4

it's a quadratic equation.

Answer 5

(x + a)(x + b). Find two numbers a and b that multiply to -21 and add to -4

Answer 6

thats tuff

Answer 7

21 doesn't have many factors, you're bound to find the right pair eventually (i.e. practically immediately).

Answer 8

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