Question

Someone please help explain how to do this

Answer 1

Answer:
`3*√(5)`
Note: if you are typing it out on the keyboard, you'd write 3*sqrt(5)
sqrt is shorthand for "square root"

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Factor 45 so that one of the factors is a perfect square and this factor is the largest perfect square possible
Then you break up the root like so

`√(45)=√(9*5)`

`√(45)=√(9)*√(5)`

`√(45)=3*√(5)`