1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab 合并同类项 2.-x^3y-1/2x^3y-xy^3-1/2x^3y+2x^3y-5/3xy^3都要合并同类项

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1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab合并同类项2.-x^3y-1/2x^3y-xy^3-1/2x^3y+2x^3y-5/3xy^3都要合并同类项1.5ab-4a^2

1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab 合并同类项 2.-x^3y-1/2x^3y-xy^3-1/2x^3y+2x^3y-5/3xy^3都要合并同类项
1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab 合并同类项 2.-x^3y-1/2x^3y-xy^3-1/2x^3y+2x^3y-5/3xy^3
都要合并同类项

1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab 合并同类项 2.-x^3y-1/2x^3y-xy^3-1/2x^3y+2x^3y-5/3xy^3都要合并同类项
合并同类项
1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab
=(1.5+3)ab-(4+4)a^2b^2-(1+7)ab^2
=4.5ab-8a^2b^2-8ab^2
-x^3y-1/2x^3y-xy^3-1/2x^3y+2x^3y-5/3xy^3
=-(1+1/2+1/2+2)x^3y-(1+5/3)xy^3
=-4x^3y-8/3xy^3

1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab
=(5+3)ab-(4+4)a²b²-（1+7）ab²
=8ab-8a²b²-8ab²
2.-x^3y-1/2x^3y-xy^3-1/2x^3y+2x^3y-5/3xy^3
=（-1-1/2-1/2+2)x^3y-(1+5/3)xy^3
=-8/3xy^3

a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快合并同类项5a²b-3ab-4ab²+7ab-2ab² 5ab^2-{2a^b-[3ab^2-(4ab^2-2a^2b)]} 4ab/b^2(a-b)= 4a^2b-4ab^2-2ab 因式分解 (a^2b^2+ab)^2-(ab+4)^2因式分解 2a²b(a-b)+ab(a-b)²+4ab²(a-b) 因式分解：2a^2b-4ab^2+8ab 因式分解6a^2b十4ab^2ab 因式分解：2a^b-4ab^2+8ab a²-2ab+b²=（）-4ab 3a²b-[2ab²-6(ab-1/2a²b)+4ab]-2ab a-b/a^2+ab / ab-a^2/a^2b^2-b^4快 a+b/2ab 2AB/A+B a+b/2ab 计算：[(a+b)^2-4ab][(a-b)^2+4ab]-(a^2-b^2)^2 1/4a^2b^2{3ab(a+b)-5a(ab-b^2)}=?