Akar-akar persamaan kuadrat dari x² – 5x 6 = 0 adalah ….

x² – 5x + 6 = 0

(x – 2) (x – 3) = 0

x – 2 = 0 ==> x₁ = 2

x – 3 = 0 ==> x₂ = 3

Atau bila persamaannya berbeda

x² – 5x – 6 = 0

(x + 1) (x – 6) = 0

x + 1 = 0 ==> x₁ = -1

x – 6 = 0 ==> x₂ = 6