Answer:
3x2 + 9x - 7
Step-by-step explanation:
x2 − 16 + 9 + x 8x + 2x2
group like terms
x2 + 2x2 + x + 8x - 16 + 9
add the numbers
x2 + 2x2 + x + 8x - 7
add x's
3x2 + x + 8x - 7
add x
