Hi I have been stuck on how to approach this question for ages now and still don't know how to start it or if I am starting it right - I have done heard of questions with a quadratic and linear factor but never a cubic factor - Please help!!
A polynomial P(x) is the product of (x^3+ax^2-x-2) and x-b.
(a) The coefficients of x^3 and x in P(x) are zero. Find the values of a and b.
So far I have re-written P(x) given that the co-efficients of x^3 and x are 0 to be:
And then I expanded the brackets to equal:
= -abx^2 + 2b
But then I am unsure how to use this to solve for a and b and don't know if I have interpreted the question right?
Factor and Reminder theorem Watch
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- 28-01-2017 14:25
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Last edited by RDKGames; 28-01-2017 at 16:05.
- 28-01-2017 16:01