Question

Add: (3x4 + x2 + 2) + (9x4 - x2 + x)
A. 12x8 + x + 2
B. 12x8 + x4 + x + 2
C. 27x4 - x2 + x + 2
D. 12x4 + x + 2

Subtract:(3x2 - x - 5) - (x + 2)
A. 3x2 - x - 3
B. 3x2 - 2x -7
C. 3x2 - 3

Answer 1

The answers are:

A. 12x8 + x + 2


B. 3x2 - 2x - 7