a²+ab-ac-bc
=a(a+b)-c(a+b)
=(a+b)(a-c)
4x²-3z-3xz-4x
=4x(x-1)-3z(1+x)
a²+ab-ac-bc 4x²-3z-3xz-4x
a²+ab-ac-bc 4x²-3z-3xz-4x
數(shù)學人氣:887 ℃時間:2020-05-31 11:35:10
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