Question

What is the square root of 12.5?

Answer 1

I found: `5sqrt(2)/2`

Explanation:

You can write:
`12.5=125/10` so:
`sqrt(12.5)=sqrt(125/10)=sqrt(125)/(sqrt(10))=sqrt(5*25)/sqrt(5*2)=`
`5sqrt(5)/(sqrt(5)sqrt(2))=5/sqrt(2)=` rationalizing:
`=5sqrt(2)/2`