Question

What is the sum or difference?
a. 5x4 + 4x4
b. 12x5y − 9x5y

Answer 1

a. 9x^4

b. 3 x^5y

Explanation:

a. 5x^4 + 4x^4

Combine like terms

9x^4

b. 12x^5 y − 9x^5 y

Subtract like terms

3 x^5y