根号50乘根号8再减去21化简
问题描述：
根号50乘根号8再减去21化简
答
√50*√8-21
=5√2*2√2-21
=10*2-21
=20-21
=-1
根号50乘根号8再减去21化简
√50*√8-21
=5√2*2√2-21
=10*2-21
=20-21
=-1