<PRE><B>Question 1038159</B>
The polynomial f(x) has degree 3. If f(-1) = 15, f(0)= 0, f(1) = -5, and f(2) = 12, then what are the x-intercepts of the graph of f?
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Using the form ax^3+bx^2+cx+d = y, 
substitute each of the x/y pairs
to create 4 equations in a,b,c,d.
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Example::
Using f(-1)=15 you get -a+b-c+d = 15
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Solve the 4-equation system for a,b,c,d
to find the cubic you want.
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Cheers,
Stan H.
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