Question

Factor the following using the difference of squares method

a) x^2 - 16 b) 9y^2 - 25

Answer 1

a)

`{x}^(2) - 16 \\ = {x}^(2) - {4}^(2) \\ = (x + 4)(x - 4)`

b)

`{9y}^(2) - 25 \\ = {(3y)}^(2) - {5}^(2) \\ = (3y + 5)(3y - 5)`

here is the answer hope that will help you