Question

\(\left(3\sqrt{5}+3\sqrt{3}\right).\left(\sqrt{5}-\sqrt{3}\right)\)

Answer 1

\(\left(3\sqrt{5}+3\sqrt{3}\right).\left(\sqrt{5}-\sqrt{3}\right)\)

= \(3\left(\sqrt{5}+\sqrt{3}\right).\left(\sqrt{5}-\sqrt{3}\right)\)

= \(3\left(5-3\right)\)

= 6