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

Question

Mathematics

Michael Simmons

4 February, 16:36

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

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Ruth Mcneil · 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