Question

How do you factor `2(5x+1)^2 - 18`?

Answer 1

First factor out the greatest common factor.

Explanation:

`=2((5x + 1)^2 -9)`

Now you have a difference of squares: `a^2 - b^2 = (a + b)(a - b)`

`=2(5x + 1 + 3)(5x + 1 - 3)`

`=2(5x + 4)(5x - 2)`

Hopefully this helps!