If →a and →b are two vectors such that |→a|=|→b|, then the greatest value of |→a+→b|+|→a−→b| is equal to

If →a and →b are two vectors such that |→a|=|→b|, then the gre

1.	If →a and →b are two vectors such that \|→a\|=\|→b\|, then the greatest value of \|→a+→b\|+\|→a−→b\| is equal to
Answer» If $\to a$ and $\to b$ are two vectors such that $\| \to a \| = \| \to b \|,$ then the greatest value of $\| \to a + \to b \| + \| \to a - \to b \|$ is equal to