1. The percentage of members that are also members of the upper class
is found by finding the total number of members who are in the upper
class and dividing by the total number of members.
I am going to assume that a member cannot be both in the upper class
as well as...
Philip's answer is correct, but just to break down the concept a little further, I will add a response as well.
I will also use T to mean true, and F to mean false, although you can use 1 for true, and 0 for false as Daniel did depending on your preference.
What I would do is...
notice that what each term has in common is a factor of 4x2
so you get 4x2(-3x3 + x2 + 1)
you can check it by distributing the 4x2 back into the (-3x3 + x2 + 1)
another way of looking at it, if it helps, is once you realize...