作业帮已知（2ax^2-x^2+3x+2)-(5x^2-4x^2+3x）与x无关 求2a^3-[3a^2+(4a-5)+a]
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已知（2ax^2-x^2+3x+2)-(5x^2-4x^2+3x）与x无关 求2a^3-[3a^2+(4a-5)+a]
已知（2ax^2-x^2+3x+2)-(5x^2-4x^2+3x）与x无关 求2a^3-[3a^2+(4a-5)+a]
已知（2ax^2-x^2+3x+2)-(5x^2-4x^2+3x）与x无关 求2a^3-[3a^2+(4a-5)+a]
（2ax^2-x^2+3x+2)-(5x^2-4x^2+3x） =(2a-1-5+4)x^2+3x-3x+2 =(2a-2)x^2+2 与X无关 则2a-2=0 a=1 2a^3-[3a^2+(4a-5)+a] =2-(3-1+1) =2-3 =-1