Question

Determine the rational zeros for the equation.
f(x)=x^3 - 2x^2 - 19x + 20

Answer 1

hey,
i dont think we can factor it in easy way..

but! you can see that x = 1 is a zero of the function (usually you should try such numbers x=1 , 0 , -1)

Answer 2

now since you know that you will have f(x) = (x-1)(x-a)(x-b)
you can find a and b. (either by long division or by the coefficients

Answer 3

The rational zeros are 1,-4,5

Answer 4

giving the answer does not really help.