\(\sqrt{29-12\sqrt{5}}\)
\(=\sqrt{\left(2\sqrt{5}\right)^2-2.2\sqrt{5}.3+3^2}\)
\(=\sqrt{\left(2\sqrt{5}+3\right)^2}\)
\(=2\sqrt{5}+3\)
\(\sqrt{29-12\sqrt{5}}\)
\(=\sqrt{\left(2\sqrt{5}\right)^2-2.2\sqrt{5}.3+3^2}\)
\(=\sqrt{\left(2\sqrt{5}+3\right)^2}\)
\(=2\sqrt{5}+3\)
rút gon : \(\sqrt{\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}}\)
Rút gọn:
\(\sqrt{\sqrt{5-\sqrt{3-\sqrt{29-12\sqrt{5}}}}}\)
Rút gọn biểu thức
a) \(\left(3-\sqrt{15}\right)\sqrt{4+\sqrt{15}}\)
b) \(\sqrt{29-12\sqrt{5}}-\sqrt{24-8\sqrt{5}}\)
rút gọn
\(E=\frac{\sqrt{8}+3}{\sqrt{17-3\sqrt{32}}}+\frac{3+2\sqrt{5}}{\sqrt{29-12\sqrt{5}}}-\frac{1}{\sqrt{12+2\sqrt{35}}}\)
5. Rút gọn
a. A=\(\sqrt{\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}}\)
Rút gọn:
B = \(\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}\)
Rút gọn \(\sqrt{5-\sqrt{3-\sqrt{29-12\sqrt{5}}}}\)
rút gọn biểu thức
\(A=\sqrt{5}-\sqrt{3-\sqrt{29-12\sqrt{5}}}\)
Rút gon các bt sau
A=\(\sqrt{12}\)+2\(\sqrt{27}\)-3\(\sqrt{48}\)
C=\(\sqrt{20a}\)+4\(\sqrt{45a}\)-2\(\sqrt{125a}\)với a≥0