\(\sqrt{x}\)=4
=>x=\(4^2\)
=>x=16
Tìm x, biết :
\(\sqrt{x}=4\)
\(\Rightarrow x=4^2\)
\(\Rightarrow x=16\)
Tìm x, biết:
\(x=\dfrac{19}{11}\cdot\dfrac{5}{14}+\dfrac{1}{11}\cdot\dfrac{5}{7}-\sqrt{\dfrac{25}{4}}\cdot\dfrac{2}{11}\)
Tìm x biết \(a\ge3;b\ge2\)
a)\(\sqrt{x^2-4x+4}=3\)
b)\(\sqrt{x^2-12}=2\)
c)\(\sqrt{x+3}=x+3\)
d)\(\sqrt{x^{ }-2x+1}=x-1\)
g)\(\sqrt{x^2-4-x^2+4}=0\)
h)\(\sqrt{x^2-9}+\sqrt{x^2-6x+9}=0\)
Tìm x, biết:
a, x4=64
b, \(x-\sqrt{x}=0\)
c, \(2x-3\sqrt{x}=0\)
d,\(x^2-\sqrt{x}=0\)
Tìm x;y biết :
a)y=\(3x^2\) -4 b)y=x+\(\sqrt{2}\) c)y=\(\dfrac{5-x}{x+1}\) d)y=\(\sqrt{x-3}\) e)y=\(\sqrt{x^2+4}\)
Tìm x, biết:
a,\(\sqrt{x}\) =4
b, \(\left(x+1\right)^2=1\)
c,\(\sqrt{x+1}=5\)
Tìm x biết:
a) \(8\sqrt{x}-3\sqrt{\dfrac{4}{81}}=5,2\)
b) \(12-3x^2=10+\sqrt{\dfrac{25}{16}}\)
1 tìm x
a,\(\sqrt{x}=6\)
b,\(\sqrt{x}=-4\)
c,\(\sqrt{x}=5\)
d,\(\sqrt{x}=\sqrt{\left(-31\right)^2}\)
\(\sqrt{x}=\sqrt{69^2}\)
2 tìm x biết
a,\(x^2-23=0\)
b,\(7-\sqrt{x}=0\)
c,\(2\sqrt{x}+1=11\)
d,\(\sqrt{x+1}+3=5\)
Tìm x, biết:
A(x) =x3 - x2 + x - 1
B(x) = 11x3 + 5x2 + 4x +10
C(x) = x4 + 5x3 + 3x2 + 2x +3
D(x) = \(\left(\sqrt{5}-1\right)x^2-\sqrt{5}x+1\)
E(x) = \(\left(1+\sqrt{5}\right)x^2+x-\sqrt{3}\)
Tìm x biết
\(18-\sqrt{x-2}-2=4\)
