2=4
3=9
4=16
5=25
6=36
7=49
8=64
9=?
hỏi 9= may
rút gọn và tính biểu thức sau
a, \(3\sqrt{144}-5\sqrt{49}+\dfrac{1}{2}\sqrt{36}\)
2) giải pt
3) \(\sqrt{4x+1}=x+1\)
4) \(2\sqrt{x-1}+\dfrac{1}{3}\sqrt{9x-9}=15\)
5) \(\sqrt{4x^2-12x+9}=7\)
6) \(5\sqrt{9x-9}-\sqrt{4x-4}-\sqrt{x-1}=36\)
giúp mk vs ah
THỰC HIỆN PHÉP TÍNH
1,\(\sqrt{3+\sqrt{5}}.\sqrt{2}\)
2,\(\sqrt{3-\sqrt{5}.\sqrt{8}}\)
3,\((\sqrt{\dfrac{3}{4}}-\sqrt{3}+5\sqrt{\dfrac{4}{3})}.\sqrt{12}\)
4,\((\sqrt{\dfrac{1}{7}}-\sqrt{\dfrac{16}{7}}+\sqrt{7}):\sqrt{7}\)
5, \(\sqrt{36-12\sqrt{5}}:\sqrt{6}\)
6,\(\sqrt{3-\sqrt{5}:}\sqrt{2}\)
35/198 + 5/18 - 7/36 + 9/60 - 11/90 + ... + 63/2976 - 65/3168
\(A=\sqrt{\frac{36-16\sqrt{5}}{12+2\sqrt{35}}}-\sqrt{\frac{81-36\sqrt{5}}{11+4\sqrt{7}}}\)
\(\sqrt{17-3\sqrt{32}-\sqrt{17+3\sqrt{32}}}\)
\(\sqrt{36-12\sqrt{5}-\sqrt{36+12\sqrt{5}}}\)
\(\sqrt{36-12\sqrt{5}-\sqrt{36+12\sqrt{5}}}\)
(1/16)^-2 x 1/8 + 49^(-2) x (1/7)^(-3) + 36^(-2) x 8^(-2) x 27
a) \(\sqrt{4x+20}+\sqrt{x+5}-\dfrac{1}{3}\sqrt{9x+45}=4\)
b) \(\sqrt{36x-36}-\sqrt{9x-9}-\sqrt{4x-4}=16-\sqrt{x-1}\)
c) \(\sqrt{x^2+6x-9}-2\sqrt{x^2-2x+1}+\sqrt{x^2}=0\)
