Simplify the polynomial (2x^3 + x^2 - 4x) - (9x^3 + - 3x^2) A) 11x^3 - 2x^2 - 4x B) -7x^3 +4x^2 - 4x C) -2x^3 - 2x^2 - 4x D) -7x^3 - 4x^2 - 4x

asked Jun 24, 2019 211k views

4 votes

Simplify the polynomial

(2x^3 + x^2 - 4x) - (9x^3 + - 3x^2)

A) 11x^3 - 2x^2 - 4x
B) -7x^3 +4x^2 - 4x
C) -2x^3 - 2x^2 - 4x
D) -7x^3 - 4x^2 - 4x

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3 votes

$(2x^3 + x^2 - 4x) - (9x^3 + - 3x^2)=2x^3+x^2-4x-9x^3+3x^2\\\\=(2x^3-9x^3)+(x^2+3x^2)-4x=-7x^3+4x^2-4x$

Answer: B) -7x^3 +4x^2 - 4x

Wyu answered Jun 29, 2019

by Wyu

8.3k points

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