Question

rezolvati ecuatia : x patrat +3x+9=3x

Answer 1

x^2+3x+9-3x=0
x^2=-9
x= 3 sau -3

Answer 2

x²+3x+9=3x
Egalam ecuatua cu 0 si in trecem pe 3x in partea stanga cu semn schimbat:
x²+3x+9-3x=0
(pe +3x si -3x in reducem )
x²+9=0 |-9
x²=-9
x=+3 sau x=-3
S={-+3}