已知8.62=73.96,若x²=0.7396,则x的值等于( ) A.86.2

问题描述:

已知8.62=73.96,若x²=0.7396,则x的值等于( ) A.86.2
已知8.62=73.96,若x²=0.7396,则x的值等于( )
A.86.2 B.862 C.±0.862 D.±862

c能否写个过程,谢谢8.62.=73.96,0.0802=0.7396.即x^2=0.7396|x|=0.862,x=土0.862