The quadratic formula works whether the coefficients of the equation are real or complex. solve the following equations using the quadratic formula and, if necessary, de moivre's theorem. (enter your answers as a comma-separated list.)

z2 − 2iz − 5 = 0

z=i+2

,

z=i-2

Step-by-step explanation:

Remember that the quadratic equation has the complex solutions (this is the quadratic formula).

Apply this with a=1, b=-2i and c=-5 to get:

. Then the solutions are

and

It isn't necessary to use De Moivre's formula.  

the number of the people going.

step-by-step explanation:

the cost to buy one movie ticket is $7. if the total cost for the movie is a function of how many people go, then the input is : the number of the people going.

overpriced

step-by-step explanation: