作业帮计算2×[-(√6+√14)/8]²-1
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 10:36:23
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计算2×[-(√6+√14)/8]²-1
计算2×[-(√6+√14)/8]²-1
计算2×[-(√6+√14)/8]²-1
2×[-(√6+√14)/8]²-1
=2×[(√6+√14)/8]²-1
=2×[(√6+√14)²/64]-1
=(√6+√14)²/32 -1
=(6+14+2√84)/32- 1
=(20+4√21)/32 -1
=(5+√21)/8 -1
=(√21+5-8)/8
=(√21-3)/8