Answer:
1. (3x² - 7x + 14) + (5x² + 4x -6) = B
2. (2x² - 5x - 3) + (-10x² + 2x + 7) = A
3. (12x² - 2x - 13) + (-4x² + 5x + 9) = C
Explanation:
(3x² - 7x + 14) + (5x² + 4x -6) (We can simplify this since there are like terms)
= 8x² - 3x + 8 (This is denoted in option B so the answer to the first question is B)
(2x² - 5x - 3) + (-10x² + 2x + 7) (We can simplify this since there are like terms)
= -8x² - 3x + 4 (This is denoted in option A so the answer to the second question is A)
(12x² - 2x - 13) + (-4x² + 5x + 9) (We can simplify this since there are like terms)
= 8x² + 3x - 4 (This is denoted in option C so the answer to the third question is C)