Question 62527: Help Please
given f(x)=15x^3-4x^2+3x-8, find all possible rational zeros
thanks for your help
Answer by venugopalramana(3286)   (Show Source):
You can put this solution on YOUR website! Help Please
given f(x)=15x^3-4x^2+3x-8, find all possible rational zeros
thanks for your help
LIST ALL FACTORS OF CONSTANT TERM -8 HERE
..THEY ARE SAY P1,P2..ETC..IN GENERAL P
=+ OR - 1,2,4,8
LIST ALL FACTORS OF COEFFICIENT OF HIGHEST DEGREE TERM 15 HERE
..THEY ARE SAY Q1,Q2..ETC..IN GENERAL Q
=+ OR - 1,3,5,15.
NOW ALL POSSIBLE RATIONAL ZEROS ARE ALL POSSIBLE COMBINATIONS OF P/Q
..THAT IS
=+ OR - 1/1,1/3,1/5,1/15,2/1,2/3,2/5,2/15,4/1,4/3,4/5,4/15,8/1,8/3,8/5,8/15
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