Упростите выражение:
а)(2x+1)(x-1),
б)(3-y2)(y-4),
в)а2+(2-a)(a+5),
г)(b-1)(b2+b-2).
а)(2x+1)(x-1),
б)(3-y2)(y-4),
в)а2+(2-a)(a+5),
г)(b-1)(b2+b-2).
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Answers & Comments
б)(3-y²)(y-4)=3y-12-y³+4y²=-y³+4y²+3y-12
в)a²+(2-a)(a+5)=a²+2a+10-a²-5a=-3a+10
г)(b-1)(b²+b-2)=b³+b²-2b-b²-b+2=b³-3b+2