# Find the Cubic Equation

*label*Mathematics

*timer*Asked: Dec 5th, 2017

*account_balance_wallet*$5

**Question description**

Please see attachment. It is only one short exercise where it asks to find the cubic equation f(x) = ax^3+bx^2+cx+d for which f(-1)=3, f(1)=1, f(2) = 6, and f(3)=7

## Tutor Answer

Here is my answer :)

Find the Cubic Equation

We evaluate each x valur in the equation, to find a equation system to obtain the a,b,c and d

values. So:

First we have for f(-1) = 3

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)

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)

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Second we have for f(1) = 1

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( )

( )

Third we have for f(2) = 6

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( )

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Fourth we have for f(3) = 7

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)

We set the equation system

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)

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)

Now we start adding and substracting equation to find the values.

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