HELP PLEASE!! Evaluate 4(x +3)(x +1)(x+5)(x-5) for x =3

Ineed to learn how to solve this problem

To make a monster appear large in a movie, a human actor wore a costume and walked through a scale model of a city. the scale used was 1 inch = 15 feet. the actor is 60 inches tall. how tall does the monster appear in the movie? question 5 options: 720 feet 75 feet 4 feet 900 feet

Find the value of x for which abcd must be a parallelogram -9-6x x-30