Question 39596
6x^2 - 12x  -  18 = 0 

divide both sides by 6 and we get...........

x^2 - 2x  - 3 = 0 

splitting of middle term and we get......

x^2 - (3-1)x  - 3 = 0 

x^2 - 3x + 1x  - 3 = 0 

x(x-3) +1(x-3) = 0 

(x-3)(x+1)= 0 

either x = 3 or = -1

hope this will help u