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]](/uploads/image/z/8878184-8-4.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%882ax%5E2-x%5E2%2B3x%2B2%29-%285x%5E2-4x%5E2%2B3x%EF%BC%89%E4%B8%8Ex%E6%97%A0%E5%85%B3+%E6%B1%822a%5E3-%5B3a%5E2%2B%284a-5%29%2Ba%5D)
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