1. simplify the radical expression.

Question

√45

5√3
3√5
3√15**
15

2. Simplify the radical expression
√180x^2

90x**
6x√5
5x√6
6√5x^2

3. simplify he radical expression
√250h^4 k^5

hk√125
5√10h^4 k^5
5h^2 k^2√10k**
25hk√10k

Answer 1

√45 = √(9*5) = √9√5 = 3√5
to factor out the 3, you need to factor out √9. You just factored out √3.
√45 = √3√15

√180x^2 = √(36*5x^2) = 6x√5

√250h^4 k^5 = √(25*10h^4 k^4*k) = 5h^2k^2√(10k)
Interesting that you got this one right, though it is a bit harder than the ones you missed ...