Question 633133
To solve part a) compute f(4)=111*4^2+680*4+4486=1776+2720+4486=8982. To solve part b) find x from f(x)=20000. 111*x^2+680*x+4486=20000 111*x^2+680*x-15514=0 *[invoke quadratic "x",111,680,-15514]