tim xEz biet:

a)\(x^2+\left(y-\frac{1}{4}\right)^4=6\)

b)\(x+\left(\frac{-31}{12}\right)^2=\left(\frac{49}{12}\right)^2-x=y^2\)

c)\(\left(x-7\right)^{x+1}-\left(x-7\right)^{x+11}=0\)

1. Tim x,y,z biet: \(\frac{1}{2}\left(x+y+z\right)-3=\sqrt{x-2}+\sqrt{y-3}+\sqrt{z-4}\) 

2. Chox,y,z > 0 thoa man \(x+y+z+\sqrt{xyz}=4\) . Tinh \(A=\sqrt{x\left(4-y\right)\left(4-z\right)+\sqrt{y\left(4-z\right)\left(4-x\right)}+\sqrt{z\left(4-x\right)\left(4-y\right)}-\sqrt{xyz}}\)

tim x biet 

\(\left(x-\frac{1}{3}\right).\left(y-\frac{1}{2}\right).\left(z-5\right)=0\)

và x+2=y+1=z+3

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,y,z biet:

\(x+1=y+2=z+3và\left(x-\frac{1}{5}\right)\left(y+\frac{1}{3}\right)\left(z-6\right)=0\)

bai 1: Tim x biet

\(\hept{\begin{cases}x-y=\frac{3}{10}\\y\left(x-y\right)=-\frac{3}{50}\end{cases}}\)

bai 2: Tim x, y biet:

x+\(\left(-\frac{31}{12}\right)^2\)=\(\left(\frac{49}{12}\right)^2\)-x=y²

Bai 9: Tim x,y,z biet:

(x-1)²+(x+y)²+(xy-z)²=0

•   Tim x, y biet 

           a,  \(\left[x+1\right]^2+\left|y+1\right|=0\) 

           b,   \(\left|x+7\right|+\left[y-2\right]^{2016}=0\)

tim x,y,z biet: \(\left(x+1\right)^2+\left(y+1\right)^2+\left(x-y\right)^2=2\)

Tim x, y, z biet:

\(\left(2x-1\right)^{2008}\) + \(\left(y-\dfrac{2}{5}\right)^{2008}\) + \(\left|x+y-z\right|\) = 0