SOLUTION: use synthetic division to find out if x+2 is a factor of {{{2x^4 + 4x^3 - 3x^2 - 3x - 6}}}

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Question 138657: use synthetic division to find out if x+2 is a factor of
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!

In order to find out if x+2 is a factor of , we can use synthetic division


So in this case, the test zero is -2



Now set up the synthetic division table by placing the test zero in the upper left corner and placing the coefficients of the numerator to the right of the test zero.
-2|24-3-3-6
|

Start by bringing down the leading coefficient (it is the coefficient with the highest exponent which is 2)
-2|24-3-3-6
|
2

Multiply -2 by 2 and place the product (which is -4) right underneath the second coefficient (which is 4)
-2|24-3-3-6
|-4
2

Add -4 and 4 to get 0. Place the sum right underneath -4.
-2|24-3-3-6
|-4
20

Multiply -2 by 0 and place the product (which is 0) right underneath the third coefficient (which is -3)
-2|24-3-3-6
|-40
20

Add 0 and -3 to get -3. Place the sum right underneath 0.
-2|24-3-3-6
|-40
20-3

Multiply -2 by -3 and place the product (which is 6) right underneath the fourth coefficient (which is -3)
-2|24-3-3-6
|-406
20-3

Add 6 and -3 to get 3. Place the sum right underneath 6.
-2|24-3-3-6
|-406
20-33

Multiply -2 by 3 and place the product (which is -6) right underneath the fifth coefficient (which is -6)
-2|24-3-3-6
|-406-6
20-33

Add -6 and -6 to get -12. Place the sum right underneath -6.
-2|24-3-3-6
|-406-6
20-33-12




Answer:

Since the last column adds to -12, we have a remainder of -12. This means is not a factor of

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