Question

решите уравнение
Х²+4х+1=х(х+2)

Answer 1

$x^{2} +4x+1=x$×$(x+2)$
$x^{2} +4+1=x^{2} +2x$
$4x+1=2x$

$4x=2x-1$
$4x-2x=-1$
$2x=-1$
$x=-\frac{1}{2}$