(x²-2xy+y²)/y²÷(y²-xy)/xy *xy²
=(x-y)²/y²*xy/(y²-xy) *xy²
=(x-y)²*xy/y(y-x) *x
=(y-x)*x²
=(3-4)*4²
=-16
y²分之(x²-2xy+y²)除以xy分之(y²-xy)乘xy²,其中x=4,y=3.
y²分之(x²-2xy+y²)除以xy分之(y²-xy)乘xy²,其中x=4,y=3.
数学人气:864 ℃时间:2019-08-17 02:38:10
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