martinezchanna97 martinezchanna97

13-06-2020
Mathematics

contestada

please help !!

what is the simplest form of this expression? (x-3)(x^2+4x+5)
A. x^3+7x^2+7x+15
B. x^3+x^2+17x+15
C. x^3+x^2-7x-15
D. x^3-7x^2-17x-15

Respuesta :

Аноним Аноним

13-06-2020

Answer:

C, x^3+x^2−7x−15

Step-by-step explanation:

=(x+−3)(x^2+4x+5)

=(x)(x^2)+(x)(4x)+(x)(5)+(−3)(x^2)+(−3)(4x)+(−3)(5)

=x^3+4x^2+5x−3x^2−12x−15

=x^3+x^2−7x−15

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