Question

$/ x^{2} -3x+1/=5$
rzolvati in R ecuatia.

Answer 1

$|x^2-3x+1|=5\Rightarrow x^2-3x+1=\pm5$

Din ecuatia
$x^2-3x+1=5\Rightarrow x^2-3x-4=0\Rightarrow x_1=4; \ x_2=-1$

Iar ecuatia

 $x^2-3x+1=-5\Leftrightarrow x^2-3x+6=0$ nu are solutii.