Question

if \left| x _{1} -x _{2}\right|=sqrt[+]{(x _{1}-x _{2})^2}

Is the something similar for \left| x _{1} +x _{2}\right|

Answer 1

\[\left| x _{1} -x _{2}\right|=\sqrt[+]{(x _{1}-x _{2})^2} \]
?similar to
\[\left| x _{1} +x _{2}\right|\]

Answer 2

I think so.

Answer 3

Either way, you're just taking absolute value of a number which is always positive, so it should be equal to the positive square-root of its square.