(y^2-x^2)/(5x^2-4xy)除于(x+y)/(5x-4y)
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![(y^2-x^2)/(5x^2-4xy)除于(x+y)/(5x-4y)](/uploads/image/z/3963837-21-7.jpg?t=%28y%5E2-x%5E2%29%2F%285x%5E2-4xy%29%E9%99%A4%E4%BA%8E%28x%2By%29%2F%285x-4y%29)
(y^2-x^2)/(5x^2-4xy)除于(x+y)/(5x-4y)
(y^2-x^2)/(5x^2-4xy)除于(x+y)/(5x-4y)
(y^2-x^2)/(5x^2-4xy)除于(x+y)/(5x-4y)
原式=(y-x)(y+x)/x(5x-4y) ÷ (x+y)/(5x-4y)
=(y-x)(y+x)/x(5x-4y) *(5x-4y)/(x+y)
=(y-x)/x
祝你新年快乐哦>_
[(y^2-x^2)/(5x^2-4xy)]/[(x+y)/(5x-4y)]
={(x+y)(x-y)/[x(5x-4y)]}/[(x+y)/(5x-4y)]
=(x-y)/x