What is the sum of the polynomials?(7x3 – 4x2) + (2x3 – 4x2)
Answer
A
5x3
B
9x3
C
5x3 – 8x2
D
9x3 – 8x2
Explanation
Combine like terms by adding the coefficients of matching powers of x: 7x³ + 2x³ = 9x³, and −4x² + (−4x²) = −8x². The sum is 9x³ − 8x², which is choice D.
AI-written and checked against the verified answer.