PLEASE HELP WILL MARK BRAINLIEST ANSWER AND EXPLAIN STEP BY STEP AND DO A DIAGRAM

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Ineed i been stuck on this question since yesterday