初二二次根式 化简求值

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初二二次根式化简求值初二二次根式化简求值初二二次根式化简求值(x²+2xy+y²)/(x²-y²)÷(x²+xy)/(x-y)=(x+y)²

初二二次根式 化简求值
初二二次根式 化简求值

初二二次根式 化简求值
(x²+2xy+y²)/(x²-y²)÷(x²+xy)/(x-y)
=(x+y)²/(x²-y²)÷(x²+xy)/(x-y)
=(x+y)/(x-y)×(x-y)/(x²+xy)
=(x+y)/(x²+xy)
=(x+y)/[x(x+y)]
=1/x
=1/(√2-1)
=√2+1.