Odpowiedź:
V=a*b*c
a)
V = (2x+y)² * (x+2y) = (4x² + 4xy+ y²)*(x+2y) = 4x³ + 4x²y+xy²+8x²y+8xy²+2y³= 4x³+12x²y+9xy²+2y³
b)
V= (2x+y)² * (3xy-y+1) = (4x² + 4xy+ y²) * (3xy-y+1) = 12x³y+12x²y²+3xy³-4x²y-4xy²-y³+4x²+4xy+y²
