(1/2)(2x2 - 6x + 8) = (1/2)0
x2 - 3x + 4 = 0
(x2 - 3x + (-3/2)2) - (-3/2)2 + 4 = 0
(x - 3/2)2 - 9/4 + 4 = 0
(x - 3/2)2 + 7/4 = 0
(x - 3/2)2 = -7/4
2.Reši enačbo:
(x2 + 6x + (6/2)2) - (6/2)2 + 9 = 0
(x + 3)2 - 9 + 9 = 0
(x + 3)2 = 0
x + 3 = 0
x = -3
Polinom p(x)=x2 + 6x + 9 ima samo eno ničlo, ki je enaka -3.
Vrni se na polinome.
Vrni se na iskanje ničel.