Question

Tính

a,8+2\(\sqrt{15}\)

b,12+2\(\sqrt{35}\)

c,8+\(\sqrt{60}\)

Answer 1

\(a,8+2\sqrt{15}=\left(\sqrt{3}+\sqrt{5}\right)^2\\ b,12+2\sqrt{35}=\left(\sqrt{7}+\sqrt{5}\right)^2\\ c,8+\sqrt{60}=8+2\sqrt{15}=\left(\sqrt{3}+\sqrt{5}\right)^2\)