Question

Решите уравнение :
3x³+6x²=12x+24

Answer 1

$3 x^{3} +6 x^{2} =12x+24$
$3x^{2} (x +2) =12(x+2)$
$3x^{2} (x +2)-12(x+2)=0$
$(x +2)(3 x^{2} -12)=0$
$x +2=0,x=-2$
$3 x^{2} -12=0,3 x^{2}=12, x^{2} =4,x=+-2$