Question

Rezolvati in R ecuatiile de gradul 2 a)5x la puterea 2 - 3x + 1 =0 b) 4x la puterea 2 - 9=0​

Answer 1

a) 5x²-3x+1 = 0

delta = 9-20 = -11 < 0

Solutiile nu apartin lui R

b) 4x²- 9 = 0

4x² = 9

x² = 9/4

x = V(9/4) = ± 3/2