Question

Which shows the factored form of x2 - 12x - 45?

(x+3xx - 15)
O (X - 3)(x - 15)
O (x+3)(x + 15)
O (x-3)(x + 15)

Answer 1

Answer: (x-15)(x+3)

Explanation:

`x^2-12x-45\\(x-15)(x+3)`

(x)(x) = x^2 which is correct

[(x)(3)]+[(-15)(x)] = 3x+(-15x) = 3x-15x = -12x which is correct

(-15)(3) = -45 which is correct.