化简 a^2-1/根号下a+1

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化简a^2-1/根号下a+1化简a^2-1/根号下a+1化简a^2-1/根号下a+1(a^2-1)/(√a+1)=(a+1)(a-1)/(√a+1)=(a+1)(√a-1)(√a+1)/(√a+1)=

化简 a^2-1/根号下a+1
化简 a^2-1/根号下a+1

化简 a^2-1/根号下a+1
(a^2-1)/(√a+1 )
=(a+1)(a-1)/(√a+1 )
=(a+1)(√a-1)(√a+1)/(√a+1 )
=(a+1)(√a-1)

a^-1 = (a+1)(a-1) = (a+1)(√a+1)(√a-1)
原式= (a+1)(√a-1)
我是老师 谢谢采纳

a^-1 = (a+1)(a-1) = (a+1)(√a+1)(√a-1)
原式= (a+1)(√a-1)

=(a+1)(a-1)/(a+1)^1/2=(a-1)(a+1)^1/2