what is the esiest way to find the square root of a number

Question

how do I solve for the sum after I squared the b and a. How do I get the sum after someone please tell me the easiest way as possible?

Answer 1

I will ignore the title (and its misspelled 'esiest') and turn my attention to this part:

how do I solve for the sum after I squared the b and a.

 

My guess is that you are dealing with something like c² = a² + b², i.e. Pythagorean theorem for right triangles.

 

If you know values of a and b, each is squared, individually, and these are then summed. This gives you c squared.

 

A calculator will be able to take the square root of that number, thus providing the value of c.

 

If c² happens to be a perfect square, and if you have taken the time to learn various perfect squares (4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169), THEN you can instantly know their square roots (2, 3, 4, ... , 13).