The problem is to factor and solve the following where G = 78

G = X2 - 5X + 6
___________
2

plug in G and see what falls out:

78 = (x^2-5x+6)/2
156 = x^2-5x+6
x^2-5x-150 = 0
(x-15)(x+10) = 0

does that help?