Question

Tìm x:

(2x - 1)^3 = 8

Answer 1

\(\left(2x-1\right)^3=8=2^3\\ \Rightarrow2x-1=2\\ 2x=3\\ x=\dfrac{3}{2}\)

Answer 2

\(\left(2x-1\right)^3=8\\ M\text{à}:2^3=8\\ \Rightarrow2^3=\left(2x-1\right)^3\\ \Leftrightarrow2x-1=2\\ \Leftrightarrow x=\dfrac{3}{2}\)

Answer 3

\(\left(2x-1\right)^3=8\)

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

\(2x=2+1\)

\(2x=3\)

\(x=\dfrac{3}{2}\)

 

Answer 4

(2x−1)3=8=23⇒2x−1=22x=3x=32