Question

Упростите выражение. (x+3)*(x^2-3x+9)-x*(x-4)*(x+4)​

Answer 1

x^3-3x^2+9x+3x^2-6x+27-(x^2-4x)*(x+4) =

x^3-3x^2+9x+3x^2-6x+27 -x^3-4x^2+4x^2+16x^2 =

9x-6x+27 +16x^2 =

16x^2+3x+27