Преобразуйте выражение в многочлен стандартного вида:
5(x-y)²+(x-2y)²;
4(m-2n)²-3(3m+n)²;
3(2a-b)²-5(a-2b)²;
4(3x+4y)²-7(2x-3y)²;
2(p-3q)²-4(2p-q)²-(2q-3p)(p+q);
5(n-5m)²-6(2m-3n)²-(3m-n)(7m-n);
(x-y)³;
(2a-b)³

1)5(x-y)²+(x-2y)²=5(x²-2xy+y²)+x²-4xy+4y²==5x²-10xy+5y²+x²-4xy+4y²=6x²-14xy+9y²2)4(m-2n)²-3(3m-n)²=4(m²-4mn+4n²)-3(9m²-6mn+n²)==4m²-16mn+16n²-27m²+18mn-3n²=-23m²+2mn+13n²3)(2a-b)²-5(a-2b)²=4a²-4ab+b²-5(a²-4ab+4b²)=4a²-4ab+b²-5a²+20ab-20b²==-a²+16ab-19b²4)(3x+4y)²-7(2x-3y)²=9x²+24xy+16y²-7(4x²-12xy+9y²)==9x²+24xy+16y²-28x²+84xy-63y²=-19x²+108xy-47y²5)2(p-3g)²-4(2p-g)²-(2g-3p)(p+g)==2(p²-6pg+9g²)-4(4p²-4pg+g²)--(2pg+2g²-3p²-3pg)==2p²-12pg+18g²-16p²+16pg-4g²-2pg-2g²+3p²+3pg==-11p²+5pg+12g²6)5(n-5m)²-6(2m-3n)²-(3m-n)(7m-n)==5(n²-10mn+25m²)-6(4m²-12mn+9n²)-(21m²-3mn-7mn+n²)==5n²-50mn+125m²-24m²+72mn-54n²-21m²+3mn+7mn-n²==-50n²+32mn+80m²7)(x-y)³=x³-2x²y+2y²x-y³8)(2a-b)³=8a³-8a²b+2ab²-b³