Hasil pemfaktoran 2x^2+3x-9

(2x - 3)(x + 3) .........

2[tex] x^{2} [/tex] + 3x - 9 = 0
(2x - 3) * (x + 3) = 0
maka:
2x - 3 = 0
2x = 3
x = 3/2

atau
x + 3 = 0
x = -3