Himpunan penyelesaian dari 2x² + 2x – 12 = 0

2x² + 2x – 12 = 0
x² + x – 6 = 0
(x – 2)(x + 3) = 0
x = 2 atau x = -3

2x² + 2x – 12 = 0

(x + 3) ( 2x – 4 ) = 0
x = -3 atau x = 2