Question

Does anybody know this???

Answer 1

So for this you will be doing proportions. And in this case, the proportion is
`(9)/(x) =(x)/(12)`

Firstly, you'll need to cross multiply. Your equation will look like this:
`108=x^2`

Finally, square root each side and your answer will be
`√(108)=x`. However this can be simplified.

`√(108) =√(18*6)=√(9*2*3*2)=2√(3*3*3) =3*2√(3) =6√(3)`

In short, your answer is
`6√(3)`