二次根式乘法计算:2√7×1/4√14

问题描述:

二次根式乘法计算:2√7×1/4√14

2√7×1/4√14
=2√7×1/4√7*√2
=1/2√2
=√2/4答案上说是7/2√22√7×1/4√14
=2√7×1/4√7*√2
=7×2√2/4=7√2/2