Question

(x^3+8x^2-3x+9)-(2x^3-4x^2-3x+7)= ​

Answer 1

Answer:

-$x^{3}$ + 12$x^{2}$ + 2

Step-by-step explanation:\

Opening the brackets, we get

$x^{3}$ + 8$x^{2}$ - 3x + 9 - 2$x^{3}$ + 4$x^{2}$ + 3x - 7

Operating on similar power terms

($x^{3}$ - 2$x^{3}$) + (8$x^{2}$ + 4$x^{2}$) + (-3x + 3x) + (9 - 7)

-$x^{3}$ + 12$x^{2}$ + 2