Looneytunness823 Looneytunness823

11-04-2017
Mathematics

contestada

(7x^2 + 9x + 7)(9x - 4)

A. 63x^3 + 53x^2 + 27x + 28
B. 63x^3 + 53x^2 + 27x - 28
C. 63x^3 + 53x^2 + 59x - 28
D. 63x^3 + 81x^2 + 27x - 28

Respuesta :

11-04-2017

B
7x^2(9x-4)= 63x^3-28x^2
9X(9X-4)= 81X^2-36X
7(9X-4)= 63X-28

63X^3-28X^2+81X^2-36X+63X-28

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