1.(x-y)(x^2+xy+y^2) 2.(3x+2y)(2x+3y)
人气:177 ℃ 时间:2020-01-28 12:59:34
解答
1.(x-y)(x^2+xy+y^2)=x³+x²y+xy²-x²y-xy²-y³=x³-y³2.(3x+2y)(2x+3y)=6x²+9xy+4xy+6y²=6x²+13xy+6y²
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