(3x-1)2 = 25/36 = (5/6)2 = (-5/6)2
=> 3x - 1 = 5/6 => 3x = 11/6 => x = 11/18
3x - 1 = -5/6 => 3x = 1/6 => x= 1/18
KL:...
\(\left(3x-1\right)^2=\frac{25}{36}\)
\(\left(3x-1\right)^2=\left(\frac{5}{6}\right)^2\)
\(\left(3x-1\right)=\frac{5}{6}\)
\(3x-1=\frac{5}{6}\)
\(3x=\frac{5}{6}+1\)
\(3x=\frac{11}{6}\)
\(x=\frac{11}{6}:3\)
\(x=\frac{11}{18}\)
k cho mik nhé!
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