Question

Q: What is the result of adding

-3x²-5x +1 and 8x²-2x-9?

A. 5x²-3x-10
B. -5x²-3x-10
C. 5x²-7x-8
D. -5x²-7x+8

Answer 1

C. 5x²-7x-8

Explanation:

(-3x²-5x +1 ) + (8x²-2x-9)

Grouping like terms:
(- 3x² + 8x²) + (- 5x - 2x) + (1 - 9)

=> (5x²) + (-7x) + (-8)

=> 5x² - 7x - 8