amandaellis02 amandaellis02

13-03-2020
Mathematics

contestada

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)

Respuesta :

VectorFundament120 VectorFundament120

13-03-2020

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

Step-by-step explanation:

[tex]x^2-12x-45\\(x-15)(x+3)[/tex]

(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.

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