Question

solve √390
I want a pic of your solution to understanding the procedure

Answer 1

Let me tell you a trick
so here it is.

Let 390 be P

Search a perfect square number near about P. Let it be Q=400. Now all you have to do is just to apply a magical formula and that's it. And the formula is already mentioned.

Answer 2

Hope this question's answer are helpful
And press the point of thanks
And please bainalest...