1.5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab 合并同类项 2.-x^3y-1/2x^3y-x
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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
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
再问: 不是的那个不是1.5 (1.只是题号)但是辛苦你了~~
再答: 5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab =(5+3)ab-(4+4)a^2b^2-(1+7)ab^2 =8ab-8a^2b^2-8ab^2
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
再问: 不是的那个不是1.5 (1.只是题号)但是辛苦你了~~
再答: 5ab-4a^2b^2-ab^2-4a^2b^2-7ab^2+3ab =(5+3)ab-(4+4)a^2b^2-(1+7)ab^2 =8ab-8a^2b^2-8ab^2
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