问题标题:
(3y-6)(-y)(-3x)(4x²-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x+1)2z(a²+3a-2)-2(a³+2a&sup书上的题…………(3y-6)(-y)(-3x)(4x²-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x-1)2a(a²+3a-2)-2(a³+2a²-a+1)
问题描述:
(3y-6)(-y)(-3x)(4x²-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x+1)2z(a²+3a-2)-2(a³+2a&sup
书上的题…………
(3y-6)(-y)(-3x)(4x²-4/3x+1)(-xy)(2x-5y-1)5x(2x+3)+x(x-1)2a(a²+3a-2)-2(a³+2a²-a+1)
陈金儿回答:
(1)(3y-6)(-y)=-3y²+6y(2)(-3x)(4x²-4/3x+1)=-12x²+4x-3x(3)(-xy)(2x-5y-1)=-2x²y+5xy²+xy(4)5x(2x+3)+x(x-1)=10x²+15x+x²-x=11x²+14x(5)2a(a²+...
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