因式分解:(x+y)(x^2+xy+y^2)-xy(y-x) 3(x-1)^2-18(x-1)+27题目是(1)(x+y)(x^2+xy+y^2)-xy(y-x) (2)3(x-1)^2-18(x-1)+27不小心打错了
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因式分解:(x+y)(x^2+xy+y^2)-xy(y-x)3(x-1)^2-18(x-1)+27题目是(1)(x+y)(x^2+xy+y^2)-xy(y-x)(2)3(x-1)^2-18(x-1)+
因式分解:(x+y)(x^2+xy+y^2)-xy(y-x) 3(x-1)^2-18(x-1)+27题目是(1)(x+y)(x^2+xy+y^2)-xy(y-x) (2)3(x-1)^2-18(x-1)+27不小心打错了
因式分解:(x+y)(x^2+xy+y^2)-xy(y-x) 3(x-1)^2-18(x-1)+27
题目是(1)
(x+y)(x^2+xy+y^2)-xy(y-x)
(2)
3(x-1)^2-18(x-1)+27
不小心打错了
因式分解:(x+y)(x^2+xy+y^2)-xy(y-x) 3(x-1)^2-18(x-1)+27题目是(1)(x+y)(x^2+xy+y^2)-xy(y-x) (2)3(x-1)^2-18(x-1)+27不小心打错了
(x+y)(x^2+xy+y^2)-xy(y-x)
=(x+y)(x^2+xy+y^2)+xy(x+y)
=(x+y)(x^2+xy+y^2+xy)
=(x+y)(x+y)^2
=(x+y)^3
3(x-1)^2-18(x-1)+27
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