x2 – 5x + 6 = 0

(i) x² – 5x + 6 = 0

Sol. x² – 5x + 6 = 0

∴  x² – 3x – 2x + 6 = 0

∴  x(x – 3) – 2(x – 3) = 0

∴  (x – 3) (x – 2) = 0

∴  x – 3 = 0 or x – 2 = 0

∴  x = 3 or x = 2