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整式的加减
问题描述
整式的加减求高手给解答
- 精选答案
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(1)(a^2+2ab-b^2)+(2b^2-2ab+2a^2) =a^2+2ab-b^2+2b^2-2ab+2a^2 =3a^2+b^2(2)6xy^2+(-3x^2y)-(-5x^2y)+5xy^2 =6xy^2-3x^2y+5x^2y+5xy^2 =11xy^2+2x^2y (3)3(xy+x^2y)-4 (x^2y-2xy)-(-x^2y) =3xy+3x^2y-4x^2y+8xy+x^2y =11xy(4)4(a-a^2+1-4a^3)-3(a+7a^2-2a^3)=4a-4a^2+4-16a^3-3a-21a^2+6a^3=a-25a^2+4-10a^3
本文标题：整式的加减
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