{x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?
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{x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?
/是分数线,第一个式子中分子是4xy,分母是x-y;第二式中分子是4xy,分母是x+y.
/是分数线,第一个式子中分子是4xy,分母是x-y;第二式中分子是4xy,分母是x+y.
原式
={[(x-y)^2+4xy]/(x-y)}{[(x+y)^2-4xy]/x+y}
={[x^2-2xy+y^2+4xy]/(x-y)}{[x^2+2xy+y^2-4xy]/x+y}
={[x^2+2xy+y^2]/(x-y)}{[x^2-2xy+y^2]/x+y}
={[(x+y)^2]/(x-y)}{[(x-y)^2]/x+y}=(x+y)(x-y)
=x^2-y^2
={[(x-y)^2+4xy]/(x-y)}{[(x+y)^2-4xy]/x+y}
={[x^2-2xy+y^2+4xy]/(x-y)}{[x^2+2xy+y^2-4xy]/x+y}
={[x^2+2xy+y^2]/(x-y)}{[x^2-2xy+y^2]/x+y}
={[(x+y)^2]/(x-y)}{[(x-y)^2]/x+y}=(x+y)(x-y)
=x^2-y^2
{x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?
怎么化简(x-y+4xy/x-y)(x+y-4xy/x+y)(/是分数线)
x^2y+4xy+4y
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
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xy-1+x-y
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