Answer:

Can you explain properly?

If you add the polynomials which are clearly stand-ins for the angles we will get 7x - 40

If you subtract the polynomials, we will get x - 20 or just 20? (Twenty is negative)

If you multiply the polynomials, we will get 12x² - 130x + 300

Step-by-step explanation:

Pick from the answers I gave you. I am just as confused as you.