Multiplication all you have to.do is multiply the denominators.
Notice the picture below

you have the center, the h,k, all you really need is the radius "r"
<h3>Given :</h3>
<h3>To Find :</h3>
<h3>Solution :</h3>

By taking L common from
, we get :



Hence, value of 
You can factor 12 from both terms to get

I believe it's a solution