Question

rezolvati in multimea numerelor reale ecuatia!! helpp $3- \sqrt{ x^{2} +3} =x$

Answer 1

$3-x= \sqrt{x^2+3} \\ x \leq 3 \\ (3-x)^2= x^{2} +3 \\ 9-6x+ x^{2} = x^{2} +3 \\ 6=6x \\ x=1$