Răspuns:
a=1
b=8
c=16
Delta = b²-4ac
Delta = 8²-4x16
Delta = 64-4x16
Delta = 0
[tex]x1 = \frac{ - b + \sqrt{delta} }{2a} \\ \\ \frac{ - 8 + \sqrt{0} }{2} = \frac{ - 8}{2} = - 4[/tex]
[tex]x2= \frac{ - b - \sqrt{delta} }{2a} \\ \\ \frac{ - 8 - \sqrt{0} }{2} = \frac{ - 8}{2} = - 4[/tex]
