HELP! How do you do this

Multiplying binomial and polynomials can be easy as long as you follow the steps for example:

Let's say you were multiplying 3x-3 and x+2

(3x-3)(x+2)

remember FOIL

OR think about it like this(see attatchment)

3x^2 + 3x -6 is what you should get

use formula for the circle a=3.14

step-by-step explanation:

47 - 90 = 43

43 - 180 = x

x = 137