Упростите выражение:
afqk
=============================
x³+3³
------- - x²-3x-9 =
x-3
x³+27-(x²+3x+9)(x-3) x³+27-(x³-3x²+3x²-9x+9x-27) 54
= -------------------------- = ------------------------------------- = --------
x-3 x-3 x-3