Question

Factor 9-x^2 completely

Answer 1

-(x + 3)(x - 3)

Explanation:

Using the difference of squares we can factor this expression.

`(9 - x^2)\\= (3^2 - x^2)\\= (3 + x)(3 - x)\\= -(3 + x)(-3 + x)\\= -(x + 3)(x - 3)`