I : giải Pt

\(\sqrt{x-4\sqrt{x+1}+3}=5\)

help me !!!

I : Rút gọn

\(\sqrt{28-6\sqrt{3}}\)

help me !!!

I : Rút gọn

\(M=\left(4+\sqrt{5}\right)\left(\sqrt{5}-\sqrt{3}\right)\sqrt{8-2\sqrt{5}}\)

help me !!!

I : Rút gọn

\(A=\sqrt{7-4\sqrt{3}}\)

\(B=\sqrt{19-8\sqrt{3}}\)

\(C=\sqrt{21-4\sqrt{5}}\)

\(D=\left(4+\sqrt{15}\right)\left(\sqrt{5}-\sqrt{3}\right)\sqrt{8-2\sqrt{5}}\)

help me !!!