Question

Answer 1

a: \(=\sqrt{3}\left(\sqrt{3}-1\right)+\sqrt{15}\left(\sqrt{3}-1\right)\)

\(=\sqrt{3}\left(\sqrt{3}-1\right)\left(1+\sqrt{5}\right)\)

b: \(=\sqrt{1-a}\left(1+\sqrt{1+a}\right)\)