Y= 4x + 8 y= x kuadrat + x - 2 Tentukan himpunan penyelesaian

y = 4x + 8, subsitudikan ke y = x^2 +x -2,
x^2 + x - 2 = 4x +8
x^2_+ x - 2 -4x -8 = 0
x^2 -3x -10 = 0
(x +2)(x -5) = 0
x1 = -2, dan x2 = 5
y1 = 4x1 +8
y1 = 4(-2) +8
y1 = 0
y2 = 4x2 + 8
y2 = 4(5)+8
y2 = 20 +8
y2 = 28
HP = { (-2,0),(5,28) }