Which of the functions below have exactly two distinct real zeros?

1. f(x) = -x2 + 14x – 45

II. f(x) = 4x2 + 4

III. f(x) = 2x2 + 12x + 18

IV. f(x) = 3x2 - 4x - 4

step-by-step explanation:

a cube has 6 sides

the probability of getting 5 on the first cube is 1/6 since only one side of the cube has 5 on it.

there are 3 sides of the cube with even number on it [2,4,6]

therefore the probability of getting even number is 3/6

for both events to happen together, the probability would be

1/6 x 3/6 = 12/36

which simplifies to 1/12