Digital PSAT Math Practice Question 37: Answer and Explanation

Question: 37

What is the sum of 3x³ + 5x - 3 and 2x² - 4x + 6?

• A. x² - 9x + 9
• B. 2x³ + 4x² - x
• C. 3x³ - x² + 2x + 3
• D. 3x³ + 2x² + x + 3

Correct Answer: D

Explanation:

(D) Combine the like terms together to find the sum: