Question

mình cần rất rất gấp mong các bn giúp cho 

\(\sqrt{5+2\sqrt{6}}\sqrt{5-2\sqrt{6}}\)

Answer 1

Answer 2

\(\sqrt{\left(5+2\sqrt{6}\right).\left(5-2\sqrt{6}\right)}\\ =\sqrt{5^2-\left(2\sqrt{6}\right)^2}\\ =\sqrt{25-24}\\ =\sqrt{1}=1\)

Answer 3

\(\sqrt{5+2\sqrt{6}}\cdot\sqrt{5-2\sqrt{6}}\)

\(=\left(\sqrt{3}+\sqrt{2}\right)\left(\sqrt{3}-\sqrt{2}\right)\)

=1