化简ab-(a-2x)*(b-x)

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化简ab-(a-2x)*(b-x)化简ab-(a-2x)*(b-x)化简ab-(a-2x)*(b-x)ab-(a-2x)*(b-x)=ab-(ab-2bx-ax+2x2)=ab-ab+2bx+ax-2

化简ab-(a-2x)*(b-x)
化简ab-(a-2x)*(b-x)

化简ab-(a-2x)*(b-x)
ab-(a-2x)*(b-x)
=ab-(ab-2bx-ax+2x2)
=ab-ab+2bx+ax-2x2
2bx+ax-2x2
x2表示X的平方

ab-(a-2x)*(b-x)
=ab-(ab-ax-2bx+2x^2)
= -2x^2+(2b+a)x

=ab-ab+ax+2bx-2*x^2
=ax+2bx-2*x^2