titik potong antara parabola Y = X kuadrat + 2 x min 5 dan garis y = x + 1

jawab

y = x² + 2x - 5
y = x  + 1 .........(-)
x² + x - 6 =0
(x  +3)(x - 2 ) = 0
x = - 3  atau x = 2

y = x + 1
x = - 3 , y = - 2
x = 2 , y = 3

titik potong (x,y) = (-3, -2), (2, 3)