x2方+2xy+y²分之x²-4y²÷2x²+2xy分之x+2y

x2方+2xy+y²分之x²-4y²÷2x²+2xy分之x+2y
x2方+2xy+y²分之x²-4y²÷2x²+2xy分之x+2y

x2方+2xy+y²分之x²-4y²÷2x²+2xy分之x+2y
原式=(x+2y)(x-2y)/(x+y)^2*2x(x+y)/x+2y
=2x(x-2y)/(x+y)
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