Đặt \(D=\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}\)
\(\Rightarrow D^2=\left(\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}\right)^2\)
\(=2-\sqrt{3}+2\sqrt{\left(2-\sqrt{3}\right)\left(2+\sqrt{3}\right)}+2+\sqrt{3}\)
\(=4+2\sqrt{4-3}\)
\(=4+2=6\)
=> \(D=\sqrt{6}\)
Vậy \(\sqrt{2-\sqrt{3}}+\sqrt{2+\sqrt{3}}=\sqrt{6}\)
\(\frac{1}{3}\left(\sqrt{6}+\sqrt{5}\right)^2-\frac{1}{4}\sqrt{120}-2\sqrt{\frac{15}{2}}.\)
\(\left(\frac{1}{2}\sqrt{\frac{2}{3}}-\frac{3}{4}\sqrt{54}+\frac{1}{3}\sqrt{\frac{8}{3}}\right):\sqrt{\frac{81}{6}}\)
AI ĐÓ TỐT BỤNG GIÚP MK ZỚI MAI MK KTRA RÙI!!!
a)\(\left(\sqrt{3}-\sqrt{2}+1\right).\left(\sqrt{3}-1\right).\)
b)\(\sqrt{15-6\sqrt{6}}+\sqrt{33-12\sqrt{6}}\)
c)\(2\sqrt{8\sqrt{3}}-2\sqrt{5\sqrt{3}}-3\sqrt{20\sqrt{3}}\)
d)\(\left(\sqrt{8}-5\sqrt{2}+\sqrt{20}\right).\sqrt{5}-\left(3.\sqrt{\frac{1}{10}}+10\right)\)
giúp mk zới:((
1) \(\left(\sqrt{6}-\sqrt{8}\right)\left(\sqrt{6}+\sqrt{8}\right).\)
2)\(\left(3-\sqrt{5}\right)\left(3+\sqrt{5}\right)\)
3)\(\sqrt{7-4\sqrt{3}}+\sqrt{7+4\sqrt{3}}\)
4)\(\sqrt{2\sqrt{3}-4}+\sqrt{2\sqrt{3}+4}\)
5)\(\sqrt{4\sqrt{6}+11}-\sqrt{11-4\sqrt{6}}\)
6)\(\sqrt{10+2\sqrt{11}}-\sqrt{10-2\sqrt{11}}\)
7)\(\sqrt{5-2\sqrt{7-2\sqrt{6}}}\)
AI ĐÓ TỐT BỤNG GIÚP MK ZỚI:((
P=\(\frac{2a+4}{a\sqrt{a}-1}+\frac{\sqrt{a}+2}{a+\sqrt{a}+1}-\frac{2}{\sqrt{a}-1}.\)
ĐKXĐ:a>0,a khác 1)
ai giúp mk zới!!!
\(\frac{5\sqrt{6-1}}{\sqrt{6}+1}\) + \(\frac{\sqrt{2}-\sqrt{3}}{\sqrt{2}+\sqrt{3}}\)+ \(\sqrt{3-2\sqrt{2}}\)
Giúp mk vs mk cần gấp :) Ai nhanh mk tick :)
\(\frac{\sqrt{3}+\sqrt{2}-1}{2+\sqrt{6}}+\frac{\sqrt{2}-\sqrt{3}}{\sqrt{2}+1}\left(\frac{\sqrt{3}}{2-\sqrt{6}}+\frac{\sqrt{3}}{2+\sqrt{6}}\right)-\frac{1}{\sqrt{2}}\)
mn giai nhanh ho mk nha ai nhanh nhat mk cho 3 k
\(\sqrt{-3x^3+5x+14}+\sqrt{-5x^3+6x+28}=\left(4-2x-x^2\right)\sqrt{2-x}\)
AI GIÚP MK VỚI MK CẦN GẤP
Câu1:\(\sqrt{\left(\sqrt{2}-\sqrt{3}\right)^2}\)- \(\dfrac{\sqrt{6}-3}{\sqrt{2}-\sqrt{3}}\)
Câu2:\(\dfrac{\sqrt{2}}{\sqrt{3}-1}-\sqrt{\dfrac{3}{2}}\)
giải cụ thể giúp mk vớiiiii ạ
1.)\(\sqrt{\left(\sqrt{3}-3\right)^2}\)+\(\sqrt{4-2\sqrt{3}}\)
2)\(\dfrac{1}{\sqrt{5}-2}\) +\(\dfrac{\sqrt{10}-\sqrt{5}}{1-\sqrt{2}}\)
3)\(\dfrac{\sqrt{2}}{\sqrt{3}-1}\) -\(\sqrt{\dfrac{3}{2}}\)
giải chi tiết giúp mk vớiiiii ạ
