一些数学题..急啊
（2s+1)-3(s^2-s+2)-2(a^2b-1⼀4ab^2+1⼀2a^3)-(-2a^2b+3ab^2)-1⼀2(5mn-2m^2+3n^2)+-3⼀2mn+2m^2+n^2⼀2(a^3+1⼀5a^2b+3-1⼀2(a^2b-6)
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2023年05月29日 20:59
热门回答（2个）
游客1
（2s+1)-3(s^2-s+2)=2s+1-3s^2+3s-6=-3s^2+5s-5
-2(a^2b-1/4ab^2+1/2a^3)-(-2a^2b+3ab^2)
=-2a^2b+1/戚岁裂2ab^2-a^3+2a^2b-3ab^2
=(-2+2)a^2b+(1/2-3)a^2b-a^3
=-a^3-5/2ab^2
-1/2(5mn-2m^2+3n^2)+-3/2mn+2m^2+n^2/高闭2
=-5/2mn+m^2-3/2n^2-3/2mn+2m^2+n^2/雀搜2
=(2+1)m^2+(-5/2-3/2)mn+(-3/2n^2+1/2)n^2
=3m^2-4mn-n^2
(a^3+1/5a^2b+3-1/2(a^2b-6)
=a^3+1/5a^2b+3-1/2a^2b+3
=a^3+(1/5-1/2)a^2b+6
=a^3-3/10a^2b+6
游客2
哪有什么题啊？
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