Question

(2x+1)³=125

 

Answer 1

\(\left(2x+1\right)^3=125\)

\(\Leftrightarrow2x+1=5\)

hay x=2

Answer 2

Giải:

\(\left(2x+1\right)^3=125\)

\(\Rightarrow\) \(\left(2x+1\right)^3=5^3\)

\(\Rightarrow2x+1=5\)

\(\Rightarrow2x=5-1\)

\(\Rightarrow2x=4\)

\(\Rightarrow4:2\)

Vậy \(x=2\)