Question

PLEASEEEE HELP ME WITH 1A. ITS EASY IF YOU KNOW HOW TO DO IT

Answer 1

Your answer is : 8x^5+7x^3-x^2+12x-2

Answer 2

If it’s easy then why not do it yourself?
It goes largest exponent first, then go down until there’s no variable or exponent.
Answer is:
8x^5 + 7x^3 -x^2 +12x -2