Answer:
8x^2-x-8
Step-by-step explanation:
6x^2 + 3x – 9-(- 2x^2 + 4x – 1 )
6x^2 + 3x – 9+2x^2 - 4x + 1
6x^2+2x^2+ 3x- 4x -9+1
Answer:4x^2-x-8
6x^2+3x-9-(2x^2+4x-1)
6x^2+3x-9-2x^2-4x+1
Collect like terms
6x^2-2x^2+3x-4x-9+1
4x^2-x-8
