Find the roots of the equation 2x 2 - 9x - 18 = 0.

Given equation is 2x² - 9x - 18 = 0
[by factorisation method]
⇒ 2x² - 12x + 3x - 18 = 0
⇒ 2x(x - 6) + 3(x - 6) = 0
⇒ (2x + 3) (x - 6) = 0
∴ x = -3/2, 6