Question

subtract the polnomials
(7sd-8s^2d+18sd^2)-(13sd^2-2sd-18s^2d)

@texaschic101

Answer 1

(7sd - 8s^2d + 18sd^2) - (13sd^2 - 2sd - 18s^2d)
distribute the negative through the parenthesis
7sd - 8s^2d + 18sd^2 - 13sd^2 + 2sd + 18s^2d
now combine like terms:
7sd - 2sd = 5sd
-8s^2d + 18s^2d = 10s^2d
18sd^2 - 13sd^2 = 5sd^2

now we have : 10s^2d + 5sd^2 + 5sd