Answer:
Step-by-step explanation:
8x² + x - 10 - [ -5x² + 7x +1] = 8x² + x - 10 + 5x² - 7x - 1
= 8x² + 5x² + x - 7x -10 - 1 {Now add the like terms}
= 13x² - 6x - 11
