先约分,再求值:y-x分之x²-2xy+y²,其中,x=2,y=3.
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先约分,再求值:y-x分之x²-2xy+y²,其中,x=2,y=3.
先约分,再求值:y-x分之x²-2xy+y²,其中,x=2,y=3.
先约分,再求值:y-x分之x²-2xy+y²,其中,x=2,y=3.
=:y-x分之(x-y)的平方
=y-x分之(y-x)的平方
=y-x
=3