1.(х-3)(х+2)=х(х+2)-3(х+2)=х²-2х-3х-6=х²-х-6
2.(2а-1)(2а+4)=2а(2а+4)-1(2а+4)=4а²+8а-2а-4
3.(5в²+2)(2в-3)=5в²(2в-3)+2(2в-3)=10в³-15в²+4в-6
4.(-х-2)(2х³-7)=-х(2х³-7)-2(2х³-7)=-2х⁴+7х-4х³+14
5.(у+3)(у²-2у+4)=у(у²-2у+4)+3(у²-2у+4)=у³-2у²+4у+3у²-6у+12=у³+у²-2у+12
