hi so im kicking myself because i know this question is easy but im just not getting it, i have searched for help and what i have found has just confused me further.
i need to express root 1/2 + root 1/4 + root 1/8 as a + b root c
so far i have gotten to 1/root 2 + 1/2 + 1/(2 root 2) but the process of turning 1/root 2 + 1/(2 root 2) into 3/4 root 2 is evading me
can any of you illustrate that last step for me please