Question

Which value of a would make the following expression completely factored? X^

Answer 1

the correct answer is A:12

Explanation:

Glad i can help :)

Answer 2

A. 12

Explanation:

Selecting B, C, or D would create a difference of perfect squares since each of these numbers are perfect squares. Additional factoring would then be needed.

`x^2-36 = (x+6)(x-6)\\x^2-49 = (x+7)(x-7)\\x^2-81=(x+9)(x-9)`

But selecting 12 gives
`x^2-12` which cannot be factored. It is factored completely.