Metode Bairstrow

mencari akar persamaan
c. y = f(x) = x^4 + 4x³ + 21x² + 4x + 20 = 0
(x² - rx + s) (b1x² + b2x + b3)

Mencari b1, b2, b3, r, s dalam table :



r = 0 ; s = -1 ; b1 = 1 ; b2 = 4 ; b3 = 20

(x² + 1) (x² + 4x + 20)

x1,2 = -b±√b²-4ac
2a

= - 4±√(4)²-4*1*20
2*1

= - 4 ± 8 i
2

X1 = -2 + 4i
X2 = -2 - 4i