Question

\(\sqrt{23-8\sqrt{ }7}\)

Answer 1

\(\sqrt{23-8\sqrt{7}}=\sqrt{\left(\sqrt{16}-\sqrt{7}\right)^2}=\sqrt{16}-\sqrt{7}=4-\sqrt{7}\)

Answer 2

\(\sqrt{23-8\sqrt{7}}=4-\sqrt{7}\)