(2x-1)的平方-(3x+1)(3x-1)+5x(x-1)等于几?

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(2x-1)的平方-(3x+1)(3x-1)+5x(x-1)等于几?
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(2x-1)的平方-(3x+1)(3x-1)+5x(x-1)等于几?
(2x-1)的平方-(3x+1)(3x-1)+5x(x-1)等于几?

(2x-1)的平方-(3x+1)(3x-1)+5x(x-1)等于几?
(2x-1)^2-(3x+1)(3x-1)+5x(x-1)
=4x^2-4x+1-9x^2+1+5x^2-5x
=-9x+2

0

(2x-1)^2-(3x+1)(3x-1)+5x(x-1)
=4x^2-4x+1-9x^2+1+5x^2-5x
=9x+2

把每部分拆开来,再合起来就行了
=-9X+2

-9x+2