计算1.(-2a^2·b)^2(ab^2-a^2·b+a^3)1.(-2a^2·b)^2(ab^2-a^2·b+a^3) 2.x(x^2+xy+y^2)-y(x^2+xy+y^2)+3xy(y+x)3.(2m-n)(4m^2-2mn+3n^2)
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![计算1.(-2a^2·b)^2(ab^2-a^2·b+a^3)1.(-2a^2·b)^2(ab^2-a^2·b+a^3) 2.x(x^2+xy+y^2)-y(x^2+xy+y^2)+3xy(y+x)3.(2m-n)(4m^2-2mn+3n^2)](/uploads/image/z/3880003-67-3.jpg?t=%E8%AE%A1%E7%AE%971.%28-2a%5E2%C2%B7b%29%5E2%28ab%5E2-a%5E2%C2%B7b%2Ba%5E3%291.%28-2a%5E2%C2%B7b%29%5E2%28ab%5E2-a%5E2%C2%B7b%2Ba%5E3%29+2.x%EF%BC%88x%5E2%2Bxy%2By%5E2%29-y%EF%BC%88x%5E2%2Bxy%2By%5E2%29%2B3xy%28y%2Bx%293.%EF%BC%882m-n%EF%BC%89%EF%BC%884m%5E2-2mn%2B3n%5E2%29)
计算1.(-2a^2·b)^2(ab^2-a^2·b+a^3)1.(-2a^2·b)^2(ab^2-a^2·b+a^3) 2.x(x^2+xy+y^2)-y(x^2+xy+y^2)+3xy(y+x)3.(2m-n)(4m^2-2mn+3n^2)
计算1.(-2a^2·b)^2(ab^2-a^2·b+a^3)
1.(-2a^2·b)^2(ab^2-a^2·b+a^3)
2.x(x^2+xy+y^2)-y(x^2+xy+y^2)+3xy(y+x)
3.(2m-n)(4m^2-2mn+3n^2)
计算1.(-2a^2·b)^2(ab^2-a^2·b+a^3)1.(-2a^2·b)^2(ab^2-a^2·b+a^3) 2.x(x^2+xy+y^2)-y(x^2+xy+y^2)+3xy(y+x)3.(2m-n)(4m^2-2mn+3n^2)
1.(-2a^2·b)^2(ab^2-a^2·b+a^3)
=4a^4b^2(b^2-ab+a^2)a=4a^5b^4-4a^6b^3+4a^7b^2
2.x(x^2+xy+y^2)-y(x^2+xy+y^2)+3xy(y+x)
=x^3+x^2y+xy^2-yx^2-xy^2-y^3+3xy^2+3x^2y=x^3+3x^2y+3xy^2-y^3
3.(2m-n)(4m^2-2mn+3n^2)
=8m^3-4m^2n+6mn^2-4m^2n+2mn^2-3n^3=8m^3-8m^2n+8mn^2-3n^3