Answer:
13x^2 - 7x + 6
Step-by-step explanation:
(9x^2 -7x) - 1(-4x^2 + 6)
(9x^2 -7x) + 4x^2 +6
9x^2 - 7x + 4x^2 + 6
(9x^2 + 4x^2) - 7x + 6
Answer: -13x^2+7x+6
9x^2-7x from -4x^2+6
(-4x+^2+6)-(9x^2-7x)
-4x^2+6-9x^2+7x
Combine like terms:
-13x^2+7x+6
