根号50+根号32除以根号8-4
问题描述:
根号50+根号32除以根号8-4
答
(√50+√32)/(√8-4)
=(5√2+4√2)(2√2+4)/(8-16)
=9√2×(2√2+4)/(-8)
=(36+36√2)/(-8)
=-9(√2+1)/2