Persamaan kuadrat yang mempunyai akar-akar-1/2 dan 1/5​

x1 = -1/2

x2 = 1/5

Persamaan kuadrat

(x – x1)(x – x2) = 0

(x – (-1/2))(x – 1/5) = 0

(x + 1/2)(x – 1/5) = 0

x² + 1/2 x – 1/5 x – 1/10 = 0

————————————— kalikan 10

10x² + 5x – 2x – 1 = 0

10x² + 3x – 1 = 0