根号下9+4根号2

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根号下9+4根号2根号下9+4根号2根号下9+4根号2根号下9+4根号2=√[8+4√2+1]=√[(2√2)²+2×2√2×1+1²]=√(2√2+1)²=2√2+1

根号下9+4根号2
根号下9+4根号2

根号下9+4根号2
根号下9+4根号2
=√[8+4√2+1]
=√[(2√2)²+2×2√2×1+1²]
=√(2√2+1)²
=2√2+1