Question

Tim x

\(\left(3x+1\right)^3=27\)

Answer 1

\(\left(3x+1\right)^3=27\Leftrightarrow3x+1=3\Leftrightarrow3x=2\Leftrightarrow x=\dfrac{2}{3}\)

Vậy ...

Answer 2

\(\left(3x+1\right)^3=27\)

\(\Leftrightarrow\left(3x+1\right)^3=3^3\)

\(\Leftrightarrow3x+1=3\Rightarrow3x=2\Rightarrow x=\dfrac{2}{3}\)

Vậy x = \(\dfrac{2}{3}\)