Question

Tìm x ( cao nhân nào giải nhanh nhanh giùm mị cái ạ !! ):

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

 

 

Answer 1

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

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

\(2x-1=3\)

\(2x=3+1=4\)

\(x=4:2\)

\(x=2\)

Answer 2

(2x-1)³=-27

(2x-1)³=-3³

2x-1=-3

2x=2

x=1

Answer 3

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

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

\(2x-1=3\)

\(2x=3+1\)

\(2x=4\)

\(x=4\text{ : }2\)

\(x=2\)

Answer 4

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

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

\(2x-1=3\)

\(2x=3+1\)

\(2x=4\)

\(x=4\text{ : }2\)

\(x=2\)