Question

(2x-1)³=8

Tìm x

Answer 1

=) 2x-1=2

2x=2+1

2x=3

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

Answer 2

\(\left(2x-1\right)^3=8\\ \Leftrightarrow\left(2x-1\right)^3=2^3\\ \Rightarrow2x-1=2\\ \Leftrightarrow2x=2+1\\ \Leftrightarrow2x=3\\ \Leftrightarrow x=\dfrac{3}{2}\)