SOLUTION: A cubic polynomial function f(x) has leading coefficient -2 and intercepts the y - axis at 2. If f(1) = 1, and f(-2)= -2, find f(-1) and write the complete function.

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Question 1036832: A cubic polynomial function f(x) has leading coefficient -2 and intercepts the y - axis at 2. If f(1) = 1, and f(-2)= -2, find f(-1) and write the complete function.
Found 2 solutions by Fombitz, MathTherapy:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!

So,



1.
Similarly,



2.
and



3.
.
.
.
Subtract 2 from 1,

4.
Subtracting 2 from 3,


5.
Adding 4 and 5,



Then,



And,




So,

and



Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

A cubic polynomial function f(x) has leading coefficient -2 and intercepts the y - axis at 2. If f(1) = 1, and f(-2)= -2, find f(-1) and write the complete function.
Complete function: 





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