Question

How do you factor `a² + 2ab + b² - x² - 6x - 9`?

Answer 1

`(a+b+x+3)(a+b-x-3)`.

Explanation:

Use `A^2-B^3=(A+B)(A-B)`

The expression is `(a+b)^2-(x+3)^2`

`(a+b+x+3)(a+b-x-3)`.