Use the discriminant to determine the number of solutions to the quadratic equation −45d2+4d−1=0.

no real solutions

2 different complex solutions

Step-by-step explanation:

b^2 - 4ac = 4^2 - 4(-45)(-1) = 16 - 180 = -164

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

answer: a

step-by-step explanation: