Answer: b. 3x² + 12x + 14
Step-by-step explanation:
To answer this question, we will find which expression cannot be broken up into factors. The GCF, greatest common factor, is the largest integer that divides into all of the terms.
✓ a. 2x + 4
➜ 2 goes into 2x and 4.
✗ b. 3x² + 12x + 14
➜ 3 goes into 12x, but it does not go into 14.
➜ 2 goes into 12x and 14, but it does not go into 3x².
➜ x goes into 3x² and 12x, but it does not go into 14.
✓ c. 9x² - 81x + 27
➜ 9 goes into 9x², -81x, and 27.
✓ d. 15x² + 3x
➜ 3x goes into 15x² and 3x.
