Need help with this Math problem

Factor the expression.

8x^2 - 32


Factor the expression by taking out the greatest common factor.

12x^2y - 8xy^2

Factor the expression by taking out the greatest common factor.

63a^3b^2 - 18a^2b^3 + 18a^3b^3

1. 8x^2-32
=8 (x^2 - 4)
=8 (x+2)(x-2)

2. 12x^2y - 8xy^2
= 4xy (3x - 2y)

3. 9a^2b^2 (7a-2b+2ab)

8x^2 - 32 = 8(x^2-4) = 8(x-2)(x+2)