Question

x^3-1=7

Answer 1

`x^3 -1=7`

`=> x^3 = 8`

`=> x^3 = 2^3`

`=> x= 2`

Vậy `x=2`

Answer 2

\(x^3-1=7\\ \Leftrightarrow x^3=8\\ \Leftrightarrow x=2\)

Answer 3

${}^{}-1=7$

$\Rightarrow {}^{}=8$

$\Rightarrow {}^{}={}^{}$

$\Rightarrow x=2$

Vậy $x=2$