Jawapan

2016-06-05T11:34:54+08:00
Y = 5x - 1
y = 2x^2 + x + p

2x^2 + x + p = 5x - 1
2x^2 + x - 5x + p + 1 = 0
2x^2 - 4x + p + 1 = 0
a = 2, b = -4, c = p + 1

b^2 - 4ac < 0
(-4)^2 - 4 (2) (p+1) < 0
16 - 8p - 8 < 0
-8p + 8 < 0
-8p < -8
p < 1 

I didn.t really know if it p < 1 or p > 1