计算:(a+1)(a²-2a+3) 5y²-(y-2)(3y+1)-2(y+1)(y-5)

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计算:(a+1)(a²-2a+3) 5y²-(y-2)(3y+1)-2(y+1)(y-5)

计算:(a+1)(a²-2a+3) 5y²-(y-2)(3y+1)-2(y+1)(y-5)
计算:(a+1)(a²-2a+3) 5y²-(y-2)(3y+1)-2(y+1)(y-5)

计算:(a+1)(a²-2a+3) 5y²-(y-2)(3y+1)-2(y+1)(y-5)
(a+1)(a²-2a+3) 5y²-(y-2)(3y+1)-2(y+1)(y-5)
原式=(a³+a²-2a²-2a+3a+3)5y²-﹙3y²-6y+y-2﹚-﹙2y²+2y-10y-10﹚
=(a³-a²+a+3)5y²-3y²+5y+2-2y²+8y+10
=5a³y²-5a²y²+5ay²+15y²-5y²+13y+12
=5a³y²-5a²y²+5ay²+10y²+13y+12