Question

Rezolva inecuatia x^2-4x+6<0 in R

Answer 1

$x^2-4x+6 < 0\\ \\ \Leftrightarrow\,x^2-4x+4+2<-0\\\Leftrightarrow\,x^2-4x+4<-2\\ \Leftrightarrow\,(x-2)^2 < -2<0\quad (F)\\ \\ \Rightarrow \boxed{x\in \emptyset}$