Question

Rezolvati in multimea nr reale ecuatia : √2$x^{2}$+1=1

Answer 1

$\sqrt{2} x^2+1=1 \\ \sqrt{2} x^2=1-1 \to \sqrt{2} x^2=0 \to x^2=0* \sqrt{2} \to x^2=0 \to x= \sqrt{0} \\ \boxed{ \boxed{x=0}}$

0∈lR⇒x∈lR