Bài 2: Căn thức bậc hai và hằng đẳng thức căn bậc hai của bình phương
Các câu hỏi tương tự
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)\(\left(4+\sqrt{15}\right)\left(\sqrt{10}-\sqrt{6}\right)\sqrt{4-\sqrt{15}}\)
Thực hiện phép tính
a) \(\left(4+\sqrt{5}\right)\left(\sqrt{10}-\sqrt{6}\right)\sqrt{4-\sqrt{15}}\)
b) \(\sqrt{3-\sqrt{5}}\left(\sqrt{10}-\sqrt{2}\right)\left(3+\sqrt{5}\right)\)
c) \(\frac{\sqrt{\sqrt{5+2}}+\sqrt{\sqrt{5}-2}}{\sqrt{\sqrt{5}+2}}-\sqrt{3-2\sqrt{2}}\)
Rút gọn :
a) left(sqrt{6}+sqrt{2}right).left(sqrt{3}-2right)left(sqrt{2+sqrt{3}}right)
b) sqrt{2}.left(sqrt{2-sqrt{3}}right).left(sqrt{3}+1right)
c) left(sqrt{10}-sqrt{6}right).left(sqrt{4-sqrt{15}}right)
d)left(sqrt{3}-sqrt{12}right).left(sqrt{5+2sqrt{6}}right)
e) sqrt{2-sqrt{3}}.left(sqrt{6}-sqrt{2}right).left(2+sqrt{3}right)
f) sqrt{4+sqrt{5sqrt{3}+5sqrt{48-10sqrt{7+4sqrt{3}}}}}
Đọc tiếp
Rút gọn :
a) \(\left(\sqrt{6}+\sqrt{2}\right).\left(\sqrt{3}-2\right)\left(\sqrt{2+\sqrt{3}}\right)\)
b) \(\sqrt{2}.\left(\sqrt{2-\sqrt{3}}\right).\left(\sqrt{3}+1\right)\)
c) \(\left(\sqrt{10}-\sqrt{6}\right).\left(\sqrt{4-\sqrt{15}}\right)\)
d)\(\left(\sqrt{3}-\sqrt{12}\right).\left(\sqrt{5+2\sqrt{6}}\right)\)
e) \(\sqrt{2-\sqrt{3}}.\left(\sqrt{6}-\sqrt{2}\right).\left(2+\sqrt{3}\right)\)
f) \(\sqrt{4+\sqrt{5\sqrt{3}+5\sqrt{48-10\sqrt{7+4\sqrt{3}}}}}\)
bài 1:rút gọn biểu thức:
a)sqrt{17-3sqrt{32}}+sqrt{17+3sqrt{32}}
b)sqrt{5+2sqrt{6}}-sqrt{5-2sqrt{6}}
c)left(frac{2}{sqrt{3}-1}+frac{3}{sqrt{3}-2}+frac{15}{3-sqrt{3}}right)timesfrac{1}{sqrt{3}+5}
d)2sqrt{40sqrt{12}}+3sqrt{5sqrt{48}}-2sqrt{sqrt{75}}-4sqrt{15sqrt{27}}
bài 2:giải phương trình
a)sqrt{9-12chi+4chi^2}4
b)sqrt{chi^2-2chi+1}+sqrt{chi^2-6chi+9}1
GIÚP EM VỚI EM ĐANG CẦN GẤP Ạ!!!!!!!!!!!!!!!!!
Đọc tiếp
bài 1:rút gọn biểu thức:
a)\(\sqrt{17-3\sqrt{32}}+\sqrt{17+3\sqrt{32}}\)
b)\(\sqrt{5+2\sqrt{6}}-\sqrt{5-2\sqrt{6}}\)
c)\(\left(\frac{2}{\sqrt{3}-1}+\frac{3}{\sqrt{3}-2}+\frac{15}{3-\sqrt{3}}\right)\times\frac{1}{\sqrt{3}+5}\)
d)\(2\sqrt{40\sqrt{12}}+3\sqrt{5\sqrt{48}}-2\sqrt{\sqrt{75}}-4\sqrt{15\sqrt{27}}\)
bài 2:giải phương trình
a)\(\sqrt{9-12\chi+4\chi^2}=4\)
b)\(\sqrt{\chi^2-2\chi+1}+\sqrt{\chi^2-6\chi+9}=1\)
GIÚP EM VỚI EM ĐANG CẦN GẤP Ạ!!!!!!!!!!!!!!!!!
Tính
A sqrt{4+sqrt{15}}- sqrt{4-sqrt{15}} -sqrt{2-sqrt{3}}
B sqrt{9-2sqrt{14}} +sqrt{9-2sqrt{14}}
C left(4+sqrt{15}right) left(sqrt{10}-sqrt{6}right) sqrt{4-sqrt{15}}
D dfrac{2+sqrt{3}}{sqrt{2}+sqrt{2}+sqrt{3}} + dfrac{2-sqrt{3}}{sqrt{2}-sqrt{2sqrt{3}}}
Đọc tiếp
Tính
A= \(\sqrt{4+\sqrt{15}}\)- \(\sqrt{4-\sqrt{15}}\) -\(\sqrt{2-\sqrt{3}}\)
B= \(\sqrt{9-2\sqrt{14}}\) +\(\sqrt{9-2\sqrt{14}}\)
C= \(\left(4+\sqrt{15}\right)\) \(\left(\sqrt{10}-\sqrt{6}\right)\) \(\sqrt{4-\sqrt{15}}\)
D= \(\dfrac{2+\sqrt{3}}{\sqrt{2}+\sqrt{2}+\sqrt{3}}\) + \(\dfrac{2-\sqrt{3}}{\sqrt{2}-\sqrt{2\sqrt{3}}}\)
Bài 1: Tính
\(\sqrt{3+2\sqrt{3}}-\sqrt{4-2\sqrt{3}}\\ \sqrt{12+6\sqrt{3}+\sqrt{12-6\sqrt{3}}}\\ \sqrt{9-4\sqrt{2}+\sqrt{9+4\sqrt{2}}}\)
\(\sqrt{\sqrt{2}+2+\sqrt{4+\sqrt{9-\sqrt{32}}}}\\ \sqrt{6+2\sqrt{5}-\sqrt{29+12\sqrt{5}}}\\ \sqrt{8+\sqrt{8}+\sqrt{20}+\sqrt{40}}-\sqrt{\sqrt{49}+\sqrt{40}}\\ \sqrt{4+\sqrt{5\sqrt{3}+5\sqrt{48-10\sqrt{7+4\sqrt{3}}}}}\)
Rút gọn
a)\(\sqrt{4-2\sqrt{ }3}-\sqrt{3}\)
b)\(\sqrt{11+6\sqrt{ }2}-3+\sqrt{2}\)
c)\(\sqrt{7+2\sqrt{ }10}-\sqrt{7-2\sqrt{ }10}\)
d)(\(20\sqrt{300}-15\sqrt{675}+5\sqrt{75}\)):\(\sqrt{15}\)
1.sqrt{frac{129}{16}+sqrt{2}}
2.sqrt{frac{289+4sqrt{72}}{16}}
3. sqrt{2-sqrt{3}}.left(sqrt{6}+sqrt{2}right)
4.left(sqrt{21}+7right).sqrt{10-2sqrt{21}}
5.2.left(sqrt{10}-sqrt{2}right).sqrt{4+sqrt{6-2sqrt{5}}}
6.left(4sqrt{2}+sqrt{30}right).left(sqrt{5}-sqrt{3}right).sqrt{4-sqrt{15}}
7.left(7+sqrt{14}right).sqrt{9-2sqrt{14}}
Đọc tiếp
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 1: thực hiện phép tính
a, (sqrt{12}+3sqrt{15}-4sqrt{135}).sqrt{3}
b, Afrac{sqrt{6}+sqrt{14}}{2sqrt{3}+sqrt{28}}
c, frac{9sqrt{5^2+3sqrt{27}}}{sqrt{5}+sqrt{3}}
d, frac{sqrt{2}+sqrt{3}+sqrt{6}+sqrt{8}+4}{sqrt{2}+sqrt{3}+sqrt{4}}
e, (sqrt{12}+sqrt{15}+sqrt{27}):sqrt{15}
f, (12sqrt{50}-8sqrt{200}+7sqrt{450}):sqrt{10}
g, (sqrt{frac{1}{7}}-sqrt{frac{16}{7}}+sqrt{frac{9}{7}}):sqrt{7}
bài 2:rút gọn rồi tính các giá trị biểu thức
a, A sqrt{frac{left(x-6right)^4}{left(5-xright)^2}}+frac{x^...
Đọc tiếp
bài 1: thực hiện phép tính
a, (\(\sqrt{12}+3\sqrt{15}-4\sqrt{135}\)).\(\sqrt{3}\)
b, A=\(\frac{\sqrt{6}+\sqrt{14}}{2\sqrt{3}+\sqrt{28}}\)
c, \(\frac{9\sqrt{5^2+3\sqrt{27}}}{\sqrt{5}+\sqrt{3}}\)
d, \(\frac{\sqrt{2}+\sqrt{3}+\sqrt{6}+\sqrt{8}+4}{\sqrt{2}+\sqrt{3}+\sqrt{4}}\)
e, (\(\sqrt{12}+\sqrt{15}+\sqrt{27}\)):\(\sqrt{15}\)
f, (12\(\sqrt{50}-8\sqrt{200}+7\sqrt{450}\)):\(\sqrt{10}\)
g, (\(\sqrt{\frac{1}{7}}-\sqrt{\frac{16}{7}}+\sqrt{\frac{9}{7}}\)):\(\sqrt{7}\)
bài 2:rút gọn rồi tính các giá trị biểu thức
a, A= \(\sqrt{\frac{\left(x-6\right)^4}{\left(5-x\right)^2}}\)+\(\frac{x^2-36}{x-5}\) (x<5) tại x=4
b, B=5x-\(\sqrt{125}\)+\(\frac{\sqrt{x^3+5x^2}}{\sqrt{x+5}}\) (x ≥ 0)tại x=\(\sqrt{5}\)