Question

rezolvati in R ecuatia radical din 2x-1=3

Answer 1

√(2x-1) = 3 |( )² C. E. : 2x-1>= 3 2x>=4 x>=2 Ridicam ecuatia la patrat si obtinem: 2x-1 = 9 2x=10 x = 5 verifica conditia

Answer 2

√(2x - 1) = 3   /ridicam ambele parti la patrat  

2X - 1 ≥3  ⇒  2X ≥ 4 ⇒ X ≥2

2x - 1 = 3²

2x - 1 = 9

2x = 9 + 1

2x = 10

x = 10 : 2

X = 5