Question

Select all the factors of: 7x2 − 28 options: 7 7x (x + 2) (x − 2) (x2 + 4)

Answer 1

7(x-2)(x+2)

Explanation:

7x^2 -28

Factor out a 7

7(x^2 -4)

The terms inside the parentheses is the difference of squares, so it is factorable (a^2-b^2) = (a-b)(a+b)

7(x-2)(x+2)