化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)
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化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)令x-y
化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)
化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)
化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)
令x-y=a
所以y-x=-a
化简一下 是不是很简单了
后面自己做
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化简:2(x-y)2-3(y-x)+5(X-Y)2=3(x-y)
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