Question

Which polynomial represents the sum below?

(4x4 - x2 - x) + (x4 + x3 + x2 + x - 1)

A. 5x4 + 2x4 + 2x2 - 1
B. 5x4 + 2x4 - 1
C. 5x4 + x3 - 1
D. 5x4 + x4 + 2x2 - 1

Answer 1

the answer is c. we add 4x^4+x^4. then cancel the -x^2+x^2 and also the -x and x . so, we are left with the -1. that's why the answer is c