Question

Could you help me figure out the answer to this problem? i’m kinda having a hard time.

Answer 1

16x² - 20x - 6

Explanation:

Given

(7x² - 10x - 6) - (- 9x² + 10x)

Distribute both parenthesis noting that the second one is distributed by - 1

= 7x² - 10x - 6 + 9x² - 10x ← collect like terms

= (7x² + 9x²) + (- 10x - 10x) - 6

= 16x² + (- 20x) - 6

= 16x² - 20x - 6

Answer 2

This is the answer but you can factorize it and get 2(4x+1) • (2x-3)