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

7 (x-2) (x+2)

Step-by-step 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)