SOLUTION: 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?

SOLUTION: 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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Question 1043703: 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?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Use the general equation,

.
.
.

1.
.
.

2.
.
.

3.
.
.

4.
.
.
Updating eq. 1,
1.
Adding eq. 1 to eq. 3,

Adding eq. 1 to eq. 4,

.
.
.
So then using eq. 3,

.
.
.

Now solve for

Solve for the three zeros or look at the graph where the func tion crosses the x-axis.
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.

.

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