Question

(x + 3)^2- 144

I have to factor it

Answer 1

Answer:

X=-15

X=9

Step-by-step explanation:

I think this is how you do it

$(x + 3)(x + 3) - 144 \\ {x}^{2} + 3x + 3x + 9 - 144 \\ {x}^{2} + 6x - 135$

From there it's a regular quadratic

${x}^{2} - 9x + 15x - 135 \\ x(x - 9) + 15(x - 9) \\( x + 15)(x - 9) \\ x = - 15 \\ x = 9$