Hi

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