根号9/16-（-根号2）平方+根号2^-4
问题描述：
根号9/16-（-根号2）平方+根号2^-4
答
(9^0.5)/16-（-(2^0.5))^2+(2^0.5)^(-4)
=3/16-2+1/(2^0.5)^4
=3/16-2+1/4
=(3-32+4)/16
=-20/16
=-1又(4/16)
=-1又(1/4)