1、数学计算题,要过程,一定会采纳~

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1、数学计算题,要过程,一定会采纳~1、数学计算题,要过程,一定会采纳~1、数学计算题,要过程,一定会采纳~原式=(x-6y)/[(x+2y)(x-2y)]+2y/[x(x-2y]=[x(x-6y)/

1、数学计算题,要过程,一定会采纳~
1、数学计算题,要过程,一定会采纳~

1、数学计算题,要过程,一定会采纳~
原式=(x-6y)/[(x+2y)(x-2y)]+2y/[x(x-2y]
=[x(x-6y)/[x(x+2y)(x-2y)]+[2y(x+2y)]/[x(x+2y)(x-2y)]
=[x²-6xy+2xy+4y²]/[x(x+2y)(x-2y)]
=(x²-4xy+4y²)/[x(x+2y)(x-2y)]
=(x-2y)²/[x(x+2y)(x-2y)]
=(x-2y)/[x(x+2y)]

原式=x-6y/(x+2y)(x-2y)+2y/x(x-2y)=x(x-6y)/x(x+2y)(x-2y)+2y×(x+2y)/x(x+2y)(x-2y)=x^2-6xy+2xy+4y^2