Question

Rezolvati ecuatia de gradul 2
X^2+2x+4=0
Multumesc

Answer 1

a = 1, b = 2, c = 4 Delta = b²-4ac = 4-4*1*4 = 4-16 = -12 < 0 => ecuatia nu are radcini in lR, dar are in C (multimea nr complexe). => x1 = (-b + i√-delta)/2a = (-2 + i√12)/2 = (-2 + 2√3 i)/2 = 2(-1 + √3 i)/2 = -1 + i√3 x2 = -1-i√3  

Answer 2

.....................