\(x-2\sqrt{x}=0\)
=>\(\sqrt{x}.\sqrt{x}-2\sqrt{x}=0\)
=>\(\left(\sqrt{x}-2\right).\sqrt{x}=0\)
=>\(\sqrt{x}-2=0=>\sqrt{x}=2=>x=4\)
hoặc \(\sqrt{x}=0=>x=0\)
Vậy x=0,4
tim x biet
\(\sqrt{\left(x-\sqrt{2}\right)^2}+\sqrt{\left(y-\sqrt{2}\right)^2}+\left|x+y+z\right|=0\)
tim x biet
\(\sqrt{\left(x-\sqrt{2}\right)^2}+\sqrt{\left(y-\sqrt{2}\right)^2}\)+Ix+y+zI=0
Tim x biet : \(x-2\sqrt{x}=0\)
\(\sqrt{\left(x-2\right)^2}+\sqrt{\left(y+2\right)^2}+\left|x+y+z\right|=0\)
tim x,y,z
tim cac so x,y,z thoa man dang thuc :
\(\sqrt{\left(x-\sqrt{2}\right)^2}+\sqrt{\left(y+\sqrt{2}\right)^2}+Ix+y+zI=0\)
Tim x ,y biet
a) x+\(\frac{1}{x}=1\)
b)x+\(\frac{2}{x}=5\)
c)x\(\sqrt{3}+3=x\sqrt{3}-x\)
d)\(\left(x-2\right)\sqrt{25n^2+5}+y-2=0\)
3,Tim x
a,\(\sqrt{1,96}\) .(2x+\(\sqrt{\frac{18}{121}}\))=\(\frac{13}{10}\)
b,(x2-2).(x2-\(\frac{9}{4}\) ).(x2+3)=0
c,x-5\(\sqrt{x}\)=0
cho A=\(\frac{\sqrt{x}+1}{\sqrt{x}-3}\)(x\(\ge\)0)
tim so nguyen de A co gia tri la so nguyen
tim x,y,z biet \(\sqrt{\left(x-\sqrt{5}\right)^2}+\sqrt{\left(y+\sqrt{3}\right)^2}+\left|x-y-z\right|\)
