Question

What is the difference of the following polynomials?

(6x^3-2x^2+4) - (2x^3+4x^2-5)


A. 4x^3-2x^2-1
B. 8x^3+6x^2-1
C. 4x^3-2x^2+1
D. 4x^3-6x^2+9
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Answer 1

Subtract the like terms:

6x^3 - 2x^3 = 4x^3

-2x^2 - 4x^2 = -6x^2

4 - (-5) = 4+5 = 9

The answer would be D) 4x^3 - 6x^2 + 9