Question

multiply r^2 + 7r + 10/3 by 3r - 30/r^2 - 5r - 50

Answer 1

(r^2 + 7r + 10/3)(-2r - 30/r^2 - 50) = -2r^3 - 30 - 50r^2 - 14r^2 - 210/r - 350r - 20/3 - 100/r^2 - 500/3 = -2r^3 - 64r^2 - 350r - 601/3 - 210/r - 100/r^2