计算1.(-2a^2·b)^2(ab^2-a^2·b+a^3)
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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)
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
=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
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