Simplify
$$\sqrt { 50 } - \sqrt { 18 }$$
giving your answer in the form \(a \sqrt { 2 }\), where \(a\) is an integer.
Hence, or otherwise, simplify
$$\frac { 12 \sqrt { 3 } } { \sqrt { 50 } - \sqrt { 18 } }$$
giving your answer in the form \(b \sqrt { c }\), where \(b\) and \(c\) are integers and \(b \neq 1\)