1)(Х²+1)³-(Х²-1)²-5Х(Х-2)+10
Х^6+3Х^4+3Х²+1-3(Х^4-2Х²+1)-5Х²+10Х+10
Х^6+3Х^4+3Х²+1-3Х^4+6Х²-3-5Х²+10Х+10
Х^6+4Х²+8+10Х
Х^6+4Х²+10Х+8
2)(Х-2)³+20(2Х-1)³+Х(Х-5)
Х³-6Х²+12Х-8+20(8Х^5-12Х²+6Х-1)+Х²-5Х
Х³-6Х²+12Х-8+160Х³-240Х²+120Х-20+Х²-5Х
161Х³-245Х²+127Х-28
-(b-2)(3-4b)=-(3b-4b²-6+8b)=-3b+4b²+6-8b=4b²-11b+6
(b+2)(3-2b)=3b-4b²+6-4b=-4b²-b+6
(b-4)²=b²-8b+16
<span>x(a-b)+y(b-a)=</span>xa-xb+yb-ya