Question

Simplify the algebraic expression by combining like terms

(15wz^2 + 3wz^3) - 5wz^3

(Can you combine like terms if the exponents are different or do they have to be the same number?)

Answer 1

15wz² - 2wz³

Explanation:

when collecting like terms the terms must have the same variables, with variables having the same exponents.

(15wz² + 3wz³) - 5wz³ ← remove parenthesis

= 15wz² + 3wz³ - 5wz³ ← collect like terms

= 15wz² + (3wz³ - 5wz³)

= 15wz² + (- 2wz³)

= 15wz² - 2wz³