=(х-2y+x+2y)((x-2y)²-x²+4y²+(x+2y)²)=2x(x²-4xy+4y²-x²+4y²+x²+4xy+4y²)=2x(12y²+x²)
(a+b)3 = a3 + 3a2b + 3ab2 + b3
(a-b)3 = a3 - 3a2 b + 3ab2 - b3
x³-6x²y+24xy²-8y³+x³+6x²y+24xy²+8y³=2x³+48xy²=2x(x²+24y²)
=(х-2y+x+2y)((x-2y)²-x²+4y²+(x+2y)²)=2x(x²-4xy+4y²-x²+4y²+x²+4xy+4y²)=2x(12y²+x²)
(a+b)3 = a3 + 3a2b + 3ab2 + b3
(a-b)3 = a3 - 3a2 b + 3ab2 - b3
x³-6x²y+24xy²-8y³+x³+6x²y+24xy²+8y³=2x³+48xy²=2x(x²+24y²)