Question

solutiile ecuatiei $x^{3} -2x=0$

Answer 1

${x}^{3} - 2x = 0$

$x( {x}^{2} - 2) = 0$

$x_{1} = 0$

${x}^{2} - 2 = 0$

${x}^{2} = 2$

$x = \pm \sqrt{2}$

$=>x_{2}=\sqrt{2}$

$=>x_{3}=-\sqrt{2}$