Question

(2x+1)³=125

Answer 1

Đề yêu cầu gì em? Tìm x hả?

\(\left(2x+1\right)^3=125=5^3\\ \Leftrightarrow2x+1=5\\ \Leftrightarrow2x=4\\ \Leftrightarrow x=2\)

=>S={2}

Answer 2

\(\left(2x+1\right)^3=125\)
\(\Rightarrow2x+1=5^{ }\)
\(\Rightarrow2x=4\)
\(\Rightarrow x=2\)

Answer 3

\(\Rightarrow\left(2x+1\right)=5^3\\ \Rightarrow2x=5-1\\ \Rightarrow2x=4\\ \Rightarrow x=4:2\\ \Rightarrow x=2\)

Answer 4

\(( 2x + 1 )^3 = 125 \) 

\(=> ( 2x + 1 )^3 = 5^3 \) 

\(=> 2x + 1 = 5 \) 

\(=> 2x = 5 - 1 \) 

\(=> 2x = 4 \)

\(=> x = 4 : 2 \)

\(=> x = 2 \) 

\(Vậy \) \(x = 2 \)