square root of a-square root of b =

square root of a-square root of b

= √a - √b

that's about it !

To find the value of the expression "square root of a minus square root of b," we need to follow these steps:

Step 1: Start with the expression: square root of a minus square root of b.

Step 2: Simplify each square root separately.
- The square root of a is just the square root of a.
- The square root of b is just the square root of b.

Step 3: Combine the simplified square roots.
There is no simple mathematical rule to simplify or combine these square roots further. So the expression "square root of a minus square root of b" cannot be simplified any further.

Therefore, the answer to the expression "square root of a minus square root of b" is simply "square root of a minus square root of b."