Question

(2x+1) mũ 3 = 27

 

Answer 1

\(\left(2x+1\right)^3=27\)

\(\Leftrightarrow2x+1=3\)

\(\Leftrightarrow2x=2\)

\(\Leftrightarrow x=1\)

Vậy x = 1

Answer 2

  

Answer 3

\(\left(2x+1\right)^3=27\\ \left(2x+1\right)^3=3^3\\ 2x+1=3\\ 2x=3-1\\ 2x=2\\ x=2:2\\ x=1\)