Объяснение:
(x+4)/(x-3) *3(x-3)/(x+4)²= 3/(x+4)
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
Объяснение:
(x+4)/(x-3) *3(x-3)/(x+4)²= 3/(x+4)
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