x2 + 10x + 24 = 0

(ii) x² + 10x + 24 = 0

Sol. x² + 10x + 24 = 0

∴  x² + 6x + 4x + 24 = 0

∴  x(x + 6) + 4(x + 6) = 0

∴  (x + 6) (x + 4) = 0

∴  x + 6 = 0 or x + 4 = 0

∴  x = –6 or x = –4