Question

Without using a calculator, determine the number of real zeros of the function. F(x)=x^3+4x^2+x-6

Answer 1

You use rational root theorem here and find that the factors can be {-6,-3,-2,-1, 1, 2, 3,6}
Then you test out all of them and whichever one works you use to factor and then factor as a normal quadratic