Bài 1: Căn bậc hai
Các câu hỏi tương tự
Rút gọn
\(C=\left(\sqrt{12+2\sqrt{14+2\sqrt{13}}}-\sqrt{12+2\sqrt{11}}\right)\left(\sqrt{11}+\sqrt{13}\right)\)
\(\sqrt{7-\sqrt{24}}-\dfrac{\sqrt{50}-5}{\sqrt{10}-\sqrt{5}}+\sqrt{\left(11-\sqrt{120}\right)\left(11+2\sqrt{30}\right)^2}\)
Rút gọn giùm mình với ạ
Tính
a/ \(2\sqrt{\dfrac{9-\sqrt{77}}{2}}-\sqrt{\dfrac{2}{10-3\sqrt{11}}}\)
b/ \(\left(\sqrt{13}-1\right)\sqrt{\dfrac{2}{7-\sqrt{13}}}+\sqrt{4+\sqrt{10+2\sqrt{5}}}+\sqrt{4-\sqrt{10+2\sqrt{5}}}\)
Bài 1:Tính
1.sqrt{12,5}cdotsqrt{0,2}cdotsqrt{0,1}
2.sqrt{48,4}cdotsqrt{5}cdotsqrt{0,5}
Bài 2:Khai triển các hằng đẳng thức sau:
a,left(sqrt{7}+sqrt{3}right)^2
b,left(sqrt{11}-sqrt{5}right)^2
c,left(sqrt{x}+sqrt{y}right)^2
d,left(sqrt{13}+sqrt{7}right)^2
e,left(sqrt{a}-sqrt{b}right)^2
f,left(sqrt{3}-1right)^2
Đọc tiếp
Bài 1:Tính
1.\(\sqrt{12,5}\cdot\sqrt{0,2}\cdot\sqrt{0,1}\)
2.\(\sqrt{48,4}\cdot\sqrt{5}\cdot\sqrt{0,5}\)
Bài 2:Khai triển các hằng đẳng thức sau:
a,\(\left(\sqrt{7}+\sqrt{3}\right)^2\)
b,\(\left(\sqrt{11}-\sqrt{5}\right)^2\)
c,\(\left(\sqrt{x}+\sqrt{y}\right)^2\)
d,\(\left(\sqrt{13}+\sqrt{7}\right)^2\)
e,\(\left(\sqrt{a}-\sqrt{b}\right)^2\)
f,\(\left(\sqrt{3}-1\right)^2\)
Tính:
a)dfrac{-3}{5} . sqrt{left(-0,5right)^{ }2}
b)4.sqrt{left(-3right)^6} + 5sqrt{left(-2right)^4}
c)sqrt{left(1-sqrt{7}right)^2} +sqrt{7}
d)sqrt{11+6sqrt{2}} - sqrt{11-6sqrt{2}}
-GIÚP MÌNH VỚI Ạ-
Đọc tiếp
Tính:
a)\(\dfrac{-3}{5}\) . \(\sqrt{\left(-0,5\right)^{ }2}\)
b)4.\(\sqrt{\left(-3\right)^6}\) + 5\(\sqrt{\left(-2\right)^4}\)
c)\(\sqrt{\left(1-\sqrt{7}\right)^2}\) +\(\sqrt{7}\)
d)\(\sqrt{11+6\sqrt{2}}\) - \(\sqrt{11-6\sqrt{2}}\)
-GIÚP MÌNH VỚI Ạ-
Rút gọn căn bậc hai theo hằng đẳng thức:
a)left(4sqrt{2}+sqrt{30}right).left(sqrt{5}-sqrt{3}right)sqrt{4-sqrt{15}}
b)2.left(sqrt{10}-sqrt{2}right).left(4+sqrt{6-2sqrt{5}}right)
c)left(7+sqrt{14}right).sqrt{9-2sqrt{14}}
d)sqrt{dfrac{289+4sqrt{72}}{16}}
e) left(sqrt{21}+7right).sqrt{10-2sqrt{21}}
f)sqrt{2-sqrt{3}.left(sqrt{6}+sqrt{2}right)}
g) sqrt{2}sqrt{8+3sqrt{7}}
h) sqrt{11+6sqrt{2}}
Đọc tiếp
Rút gọn căn bậc hai theo hằng đẳng thức:
a)\(\left(4\sqrt{2}+\sqrt{30}\right).\left(\sqrt{5}-\sqrt{3}\right)\sqrt{4-\sqrt{15}}\)
b)\(2.\left(\sqrt{10}-\sqrt{2}\right).\left(4+\sqrt{6-2\sqrt{5}}\right)\)
c)\(\left(7+\sqrt{14}\right).\sqrt{9-2\sqrt{14}}\)
d)\(\sqrt{\dfrac{289+4\sqrt{72}}{16}}\)
e) \(\left(\sqrt{21}+7\right).\sqrt{10-2\sqrt{21}}\)
f)\(\sqrt{2-\sqrt{3}.\left(\sqrt{6}+\sqrt{2}\right)}\)
g) \(\sqrt{2}\sqrt{8+3\sqrt{7}}\)
h) \(\sqrt{11+6\sqrt{2}}\)
Rút gọn biểu thức.
a) \(\sqrt{\left(1-\sqrt{2}\right)^2}-\sqrt{3+2\sqrt{2}}+\sqrt{\left(-2\right)^6}\)
b) \(\sqrt{7+4\sqrt{3}}+\sqrt{13-4\sqrt{3}}\)
1.Tính :
a.\(\sqrt{11+6\sqrt{2}}+\sqrt{19+6\sqrt{2}}\)
b.\(-\sqrt{2\left(2-\sqrt{3}\right)}+\sqrt{2\left(2+\sqrt{3}\right)}\)
c.\(\frac{\sqrt{7+4\sqrt{3}}+\sqrt{7-4\sqrt{3}}}{2\sqrt{3}}\)
1.Tính:
a.\(\sqrt{11+6\sqrt{2}-\sqrt{19+6\sqrt{2}}}\)
b.\(-\sqrt{2\left(2-\sqrt{3}\right)}+\sqrt{2\left(2+\sqrt{3}\right)}\)
c.\(\frac{\sqrt{7+4\sqrt{3}}+\sqrt{7-4\sqrt{3}}}{2\sqrt{3}}\)