1)а²(а+2)(а-7)= а²(а²-7а+2а-14)=а⁴-5а³-14а²
2) -5х²(х+1)(3-х)= -5х²(3х-х²+3-х)= -10х³+5х⁴-15х²
3) (b+3)(b+2)(b+1)= (b²+2b+3b+6)(b+1)=b³+b²+5b²+5b+6b+6=6b²+b³+11b+6
4) (y-2)(y-1)(y+4)=(y²-y-2y+2)(y+4)=y³+4y²-3y²-12y+2y+8=y³+y²-10y+8
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1)а²(а+2)(а-7)= а²(а²-7а+2а-14)=а⁴-5а³-14а²
2) -5х²(х+1)(3-х)= -5х²(3х-х²+3-х)= -10х³+5х⁴-15х²
3) (b+3)(b+2)(b+1)= (b²+2b+3b+6)(b+1)=b³+b²+5b²+5b+6b+6=6b²+b³+11b+6
4) (y-2)(y-1)(y+4)=(y²-y-2y+2)(y+4)=y³+4y²-3y²-12y+2y+8=y³+y²-10y+8