Please do step by steps for each! 1) Write the polynomial with roots at 5 and 4i

2) Write the polynomial with roots at 0, -3, 5i and -5i

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !