## Algebra: A Combined Approach (4th Edition)

Answer: =$-5{x^2} + 5x + 1$
$(-9{x^2} + 6x + 2) + (4{x^2} - x -1)$ = $-9{x^2} + 4{x^2} + 6x -x + 2 -1$ = $-5{x^2} + 5x + 1$