=> \(x-5=0\) và \(y^2-4=0\)
. \(x-5=0\Rightarrow x=5\) .\(y^2-4=0\Rightarrow y^2=4\Rightarrow y^2=2^2\Rightarrow y=2hoặc-2\)
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Tìm x biết
a)\(\frac{x+1}{x-4}>0\)
b)\(\left|x+\frac{3}{4}\right|+\left|y-\frac{1}{5}\right|+\left|x+y+z\right|=0\)
c)\(\left(x+2\right)\left(x-3\right)< 0\)
d)\(\left|x+\frac{3}{4}\right|+\left|y-\frac{2}{5}\right|+\left|z+\frac{1}{2}\right|\le0\)
Tìm \(x;y;z\in Q\) biết:
a)\(\left|x+\frac{3}{7}\right|+\left|y-\frac{4}{9}\right|+\left|z+\frac{5}{11}\right|=0\)
b)\(\left|x-\frac{2}{5}\right|+\left|x+y-\frac{1}{2}\right|+\left|y-z+\frac{3}{5}\right|=0\)
c)\(\left|x+y-2,8\right|+\left|y+z+4\right|+\left|z+x-1,4\right|=0\)
Giúp mk vs.Ai làm được câu nào thì làm!
Bài 2: Tìm x, y biết :
a) \(\left(3x-\frac{y}{5}\right)^2+\left(2y+\frac{3}{7}\right)^2=0\)
b) \(\left(x+y-\frac{1}{4}\right)^2+\left(x-y+\frac{1}{5}\right)^2=0\)
Tìm X,y,Z € Q, biết:
a)\(\left|x+\frac{1}{2}\right|+\left|y-\frac{3}{4}\right|+\left|z-1\right|=0\)
b)\(\left|x-\frac{3}{4}\right|+\left|\frac{2}{5}-y\right|+\left|x-y+z\right|=0\)
Tìm x,y biết:
a) \(\left(x-5\right)^8-2|y^2-4|=0\)
b) \(x-5+|x-3|=4\)
c) \(\sqrt{\left(x+7\right)^2}+\left(x^2-49\right)^{2012}=0\)
d) \(2|3-x|^{2017}+\left(y-x+1\right)^{2016}\le0\)
Help me!!!
tìm x và y biết
a) \(\left|x-y-2\right|+\left|y+3\right|=0\)
b) \(\left|x-3y\right|^{2007}+\left|y+4\right|^{2008}=0\)
c) \(\left(x+y\right)^{2006}+2007\left|y-1\right|=0\)
d) \(\left|x-y-5\right|+2007\left(y-3\right)^{2008}=0\)
Tìm x.y , biết
a )\(\left(x-1\right)^2+\left(y-3\right)^2=0\)
b) \(\left(2x-\frac{1}{2}\right)^4+\left(y+\frac{3}{2}\right)^8=0\)
c) \(\left(\frac{1}{2}x-5\right)^{20}+\left(y^2-\frac{1}{4}\right)^{10}\le0\)
tìm x;y;z biết:
\(\left(x+2\right)^2+\left(y-3\right)^4+\left(z-5\right)^6=0\)
tìm x,y,z \(\in\)Q, biết
\(\left|x-\frac{3}{4}\right|+\left|\frac{2}{5}-y\right|+\left|x+y+z\right|\)=0