Tumaiesla G.

asked • 10/12/15

How do you know the multiplicity is 2?

f(x)= x^4 - x^3 - 20x^2
Find all real zeros and determine the multiplicity of each.
i did my factors and got 5,4,1,20,10,2
so i did synthetic with 5 and it was a factor. then I did synthetic with -4 and it was a factor. then x= 0 another zero. And then if I do synthetic again -4 comes out again. My question is how can I know that -4 has a multiplicity of 2 without having to do synthetic to find out so. 

1 Expert Answer


Michael J. answered • 10/12/15

Effective High School STEM Tutor & CUNY Math Peer Leader

Tumaiesla G.

thank you very much


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