Question

Rezolvati in multimea numerelor reale ecuatia.

Answer 1

V(x^2 +6x)=x ridici totul la a 2

x^2 +6x= x^2

6x=0

x=0

Answer 2

$\it \sqrt{x^2+6x}=x \Rightarrow (\sqrt{x^2+6x})^2=x^2 \Rightarrow x^2+6x=x^2|_{-x^2} \Rightarrow 6x=0\Rightarrow x=0$