1.\(\sqrt{\frac{129}{16}+\sqrt{2}}\)
2.\(\sqrt{\frac{289+4\sqrt{72}}{16}}\)
3. \(\sqrt{2-\sqrt{3}}.\left(\sqrt{6}+\sqrt{2}\right)\)
4.\(\left(\sqrt{21}+7\right).\sqrt{10-2\sqrt{21}}\)
5.\(2.\left(\sqrt{10}-\sqrt{2}\right).\sqrt{4+\sqrt{6-2\sqrt{5}}}\)
6.\(\left(4\sqrt{2}+\sqrt{30}\right).\left(\sqrt{5}-\sqrt{3}\right).\sqrt{4-\sqrt{15}}\)
7.\(\left(7+\sqrt{14}\right).\sqrt{9-2\sqrt{14}}\)
Bài 4: Rút gọn căn bậc 2 theo hằng đẳng thức
a> \(\sqrt{8+2\sqrt{15}}\)
b> \(\sqrt{23+4\sqrt{15}}\)
c> \(\sqrt{11+4\sqrt{6}}\)
d> \(\sqrt{14-6\sqrt{5}}\)
e> \(\sqrt{22-8\sqrt{6}}\)
f> \(\sqrt{16-6\sqrt{7}}\)
g> \(\sqrt{9-4\sqrt{2}}\)
h> \(\sqrt{13-4\sqrt{3}}\)
i> \(\sqrt{7-4\sqrt{3}}\)
j> \(\sqrt{21-8\sqrt{5}}\)
k> \(\sqrt{4-2\sqrt{3}}\)
p> \(\sqrt{5-2\sqrt{6}}\)
s>\(\sqrt{10-2\sqrt{21}}\)
x> \(\sqrt{28-10\sqrt{3}}\)
y> \(\sqrt{9-4\sqrt{5}}\)
Tính và rút gọn :
1) \(\sqrt{14+2\sqrt{33}}\)
2) \(\sqrt{29-12\sqrt{5}}\)
3) \(\sqrt{16+2\sqrt{55}}\)
4) \(\sqrt{13+4\sqrt{10}}\)
5) \(\sqrt{36+12\sqrt{5}}\)
6) \(\sqrt{21-6\sqrt{6}}\)
1.tính
a) \(\sqrt{3-2\sqrt{2}}\)
b)\(\sqrt{28+10\sqrt{3}}\)
c)\(\sqrt{14+6\sqrt{5}}\)
d)\(\sqrt{13-4\sqrt{3}}\)
2.tính
a)\(\sqrt{8-2\sqrt{7}}-\sqrt{8+2\sqrt{7}}\)
b)\(\sqrt{18+8\sqrt{2}}-\sqrt{18-8\sqrt{2}}\)
Viết các biểu thức sau dưới dạng bình phương một tổng hoặc một hiệu :
1) \(5-2\sqrt{6}\)
2) \(8+2\sqrt{15}\)
3) \(10-2\sqrt{21}\)
4) \(21+6\sqrt{6}\)
5) \(14+8\sqrt{3}\)
6) \(36-12\sqrt{5}\)
7) \(25+4\sqrt{6}\)
8) \(98-16\sqrt{3}\)
Rút gọn biểu thức
a) \(\sqrt{11-2\sqrt{10}}\)
b) \(\sqrt{9-2\sqrt{14}}\)
c) \(\sqrt{4+2\sqrt{3}}+\sqrt{4-2\sqrt{3}}\)
d) \(\sqrt{9-4\sqrt{5}}-\sqrt{9+4\sqrt{5}}\)
e) \(\sqrt{4-\sqrt{7}}-\sqrt{4+\sqrt{7}}\)
g) \(\sqrt{3}+\sqrt{11+6\sqrt{2}}+\sqrt{5+2\sqrt{6}}\)
h) \(\sqrt{5\sqrt{3}+5\sqrt{48-10\sqrt{7+4\sqrt{3}}}}\)
k) \(\sqrt{94-42\sqrt{5}}-\sqrt{94+42\sqrt{5}}\)
i) \(\sqrt{4+\sqrt{10+2\sqrt{5}}}+\sqrt{4-\sqrt{10+2\sqrt{5}}}\)
1)\(\sqrt{4+\sqrt{10+2\sqrt{5}}}+\sqrt{4-\sqrt{10+2\sqrt{5}}}\)
2)\(\sqrt{35+12\sqrt{6}}-\sqrt{35-12\sqrt{6}}\)
3)\(\left(4+\sqrt{15}\right)\left(\sqrt{10}-\sqrt{6}\right)\sqrt{4-\sqrt{15}}\)
Bài 1: Tính
\(\sqrt{3+2\sqrt{3}}-\sqrt{4-2\sqrt{3}}\\ \sqrt{12+6\sqrt{3}+\sqrt{12-6\sqrt{3}}}\\ \sqrt{9-4\sqrt{2}+\sqrt{9+4\sqrt{2}}}\)
\(\sqrt{\sqrt{2}+2+\sqrt{4+\sqrt{9-\sqrt{32}}}}\\ \sqrt{6+2\sqrt{5}-\sqrt{29+12\sqrt{5}}}\\ \sqrt{8+\sqrt{8}+\sqrt{20}+\sqrt{40}}-\sqrt{\sqrt{49}+\sqrt{40}}\\ \sqrt{4+\sqrt{5\sqrt{3}+5\sqrt{48-10\sqrt{7+4\sqrt{3}}}}}\)
\(a,\sqrt{10+\sqrt{9}}\)
b,\(\sqrt{21+6\sqrt{6}}\)-\(\sqrt{21-6\sqrt{6}}\)
c\(\sqrt{4+\sqrt{10+2\sqrt{5}}}+\sqrt{4-\sqrt{10-2\sqrt{5}}}\)
d,\(\sqrt{x+1+2\sqrt{x}}\)
e,\(\sqrt{2\text{x}+3+2\sqrt{x^2+3\text{x}+2}}\)
giúp mik với,cảm ơn trc ạ