神马作文网1.（4/3a^2b^2-2ab)*1/2ab 2.-2a^2*(-1/2ab+b^2)-5a*(a^2b+ab^2)
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1.（4/3a^2b^2-2ab)*1/2ab 2.-2a^2*(-1/2ab+b^2)-5a*(a^2b+ab^2) 3.(3/2xy+x^2-y^2)(-2xy)-(-xy)^2
注^后面是平方
注^后面是平方
(4/3a^2b^2-2ab)*1/2ab=2/3ab-1
-2a^2*(-1/2ab+b^2)-5a*(a^2b+ab^2)=a^3b-2a^2b^2-5a^3b-5a^2b^2=-4a^3b-7a^2b^2
(3/2xy+x^2-y^2)(-2xy)-(-xy)^2=-3x^2y^2-2x^3y+2xy^3-x^2y^2=2xy^3-2x^3y-4x^2y^2
-2a^2*(-1/2ab+b^2)-5a*(a^2b+ab^2)=a^3b-2a^2b^2-5a^3b-5a^2b^2=-4a^3b-7a^2b^2
(3/2xy+x^2-y^2)(-2xy)-(-xy)^2=-3x^2y^2-2x^3y+2xy^3-x^2y^2=2xy^3-2x^3y-4x^2y^2
a+b/2ab
2AB/A+B
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
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