Question

Can someone tell me how to solve this?

Answer 1

$\sqrt 676 =26$

Answer 2

So, if you are multiplying the two radicals (numbers under a root, like a square root), you can put both under the same square root. Like this, the square root of 13 times square root of 52 is the same as the square root of 13 times 52. So the answer is actually the square root of 676, and that is 26.