Question

(2x-1)³=-8

Answer 1

(2x - 1)³ = -8 = (-2)³

=> 2x - 1 = -2

=> 2x = -2 + 1 = -1

=> x = -1/2

Answer 2

(2x - 1)³  = -8

=> 2x - 1 = -2

=> 2x = -2 + 1 = -1

=> x = -0,5

Answer 3

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

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

\(\Rightarrow2x-1=-2\)

\(\Rightarrow2x=-1\)

\(\Rightarrow x=-\frac{1}{2}\)

Answer 4

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

\(\Rightarrow2x-1=\sqrt[3]{-8}\)

\(\Rightarrow2x-1=-2\)

\(\Rightarrow2x=-1\)

\(\Rightarrow x=-\frac{1}{2}\)

Answer 5

(2x-1)³=-8

=>(2x-1)³=(-2)³

=>2x-1=-2

=>2x=-2+1

=>2x=-1

=>x=-1:2

=>x=-1/2=-0,5