Find all values of such that sqrt4 x^2 + sqrt x^2=6.
there are more than 1 answers, and 2 and 6 i have done, dont know the rest
sqrt4 x^2 + sqrt x^2=6
You have not used brackets, is this the question?
\(\sqrt{4 x^2} + \sqrt {x^2}=6\)
\(\sqrt{x^2}=|x| \\SO\\ 2|x|+|x|=6\\ 3*|x|=6\\ |x|=2\\ x=\pm2\)
I have assumed that x is a real number.
+28 
