Answer:
The correct answer is A. 10x² + 3x - 6
Step-by-step explanation:
Let's simplify (3x2 − 5x + 9) + (7x2 + 8x − 15) :
(3x2 − 5x + 9) + (7x2 + 8x − 15)
3x2 − 5x + 9 + 7x2 + 8x − 15 (Opening the parenthesis)
3x² + 7x² - 5x + 8x + 9 - 15 (Aligning similar terms)
10x² + 3x - 6
The correct simplified form is A. 10x² + 3x - 6
Step-by-step explanation:
hope this helps
