根号下8+2倍根号7怎么算?

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根号下8+2倍根号7怎么算?根号下8+2倍根号7怎么算?根号下8+2倍根号7怎么算?√﹙8+2√7﹚=√﹙7+2√7+1﹚=√﹙√7+1﹚²=√7+1.

根号下8+2倍根号7怎么算?
根号下8+2倍根号7怎么算?

根号下8+2倍根号7怎么算?
√﹙8+2√7﹚
=√﹙7+2√7+1﹚
=√﹙√7+1﹚²
=√7+1.