a) \(\left|x\right|=2,1\)
x= +- 2,1
b) \(\left|x\right|=\frac{3}{4}\left(x< 0\right)\)
x= -3/4
c) \(\left|x\right|=-1\frac{2}{5}\)
\(x\in\varphi\)
d) \(\left|x\right|=0,35\left(x>0\right)\)
\(x=0,35\)
a) |x| = 2,1 <=> \(\orbr{\begin{cases}x=2,1\\x=-2,1\end{cases}}\)
b) |x| = 3/4 <=> x = - 3/4 ( do x < 0 )
c) ko tim dc x vi |x| >= 0 voi moi x
d) |x| = 0,35 <=> x = 0,35 ( do x>0 )