The question reads :show that the function f(x) =-x^5+4x^4-16x^3+12x+5 has two zeros in the interval (-2,0)"
With the intermediate theory I know that f(-2) is -59 and f(0) is 5 so we know there is one zero
But how on earth do you figure out if there is two????
Thanks in advance
from this Calculus beginner