Add or subtract.

Question

(7x^2-x-2)-(-6x^3+3)
Show your work.

A. 6x^3+ 7x^2-x-5

B. -6x^3+7x^2-x+1

C. -x^3-x-5

D. x^2-x+1

Answer 1

Solution:

(7x^2-x-2)-(-6x^3+3)

= 7x^2-x-2+6x^3-3 (distributing negative sign)

= 6x^3+7x^2-x-5

Therefore, the answer is A. 6x^3+ 7x^2-x-5.