rezolvati in multimea numerelor reale ecuatiile (×+1) patrat - 9 = 0
(x - 2) patrat = 4
x patrat +2 radical 2x. + 2 = 0
x patrat + 2x. + 1 = 25
x patrat -2 radical 3x. +3 = 27
x patrat + 3x +2 = 0
x patrat + x - 2 = 0
-x patrat + 2x + 5 = 0
Trebuie sa aflu a,b,c, delta si x1,2​