Question 73808
Find all of the rational zeros of f(x)=4x^3-3x^2-22x-15. 
x=-1 is a zero; Use synthetic division to look for the other zeroes.
-1...4....-3....-22....-15
.....4....-7....-15,,|,.0
3....4.....5...|..0
Final factor: 4x+5=0
x=-5/4
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Zeroes: x=-1; x=3; x=5/4
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Cheers,
Stan H.