1. x y -1 0 1 2 3 4 1.5 y = x2 - 3x 4 -2 -2 4 -2.25 Solutions of
1.5
y = x2 - 3x 4 -2 -2 4
-2.25 y x 1 2 3 4 –1 5 –2 –3 6
y = x2-3x
Solutions of
x2 - 3x = 0
x = 0, x = 3
Solutions of
x2 - 3x = 3
x = -0.8, x = 3.8
Minimum (1.5,-2.25)

2. x y
y = 5 + 2x - 4x2
-37
-15 -1 5 3 -7
-25 x y 1 2 3 –1 –2 –3
-15
-10 -5 5
-20
-25
-30
-35
-40
Maximum (0.25, 5.25)
Solutions of
5 + 2x - 4x2 = 0
x = -0.9, x = 1.4
Solutions of
25 + 2x - 4x2 = 0
y = 5 + 2x - 4x2
5 + 2x - 4x2 = -20
x = -2.3, x = 2.8