How do you add/subtract square roots?

figure out the square root then do the equation with the answer

I mean, for simplifying them, like how 50 = 5√2

for 50 = 5√2 

5*2=10*5=50 

Is this what u needed to know

oops, no, I meant √50 = 5√2

Please help me, PLEASE?

With √50 = 5√2 

You do the 50 

Then you do the 2

Then multiply the answer for the 2 by 5 and the fifty and the five by the square root of 2 is equal to the same thing 

7.071067812

 √178 -√8 + √22  =

√ [ 89 *2]  - 2√2  +  √ [2 * 11]  =

√89 * √2  - 2√2  + √2 * √11  =

√2  [  √89  - 2  + √11 ] 

There is no "simplification"  of this, really