Answer:
4√5
Explanation:
To simplify √20+√45-√5, we need to look for factors that can be simplified under the square root. We can simplify 20 and 45 by factoring out perfect squares:
√20 + √45 - √5 = √(4×5) + √(9×5) - √5
= 2√5 + 3√5 - √5
= 4√5
Therefore, the simplest form of the expression is 4√5