1) (x^2 + 8x) - (4 - 3x= x^2 + 8x - 4 + 3= x^2 + 11x - 4
2) (2x^2 + 5x) - (4x^2 - 2x= 2x^2 + 5x - 4x^2 + 2= -2x^2 + 7x
1) (x^2 + 8x) - (4 - 3x
= x^2 + 8x - 4 + 3
= x^2 + 11x - 4
2) (2x^2 + 5x) - (4x^2 - 2x
= 2x^2 + 5x - 4x^2 + 2
= -2x^2 + 7x