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Find the remainder of (x4 – 2) ÷ (x + 1)

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User Pixielex
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8.6k points

1 Answer

4 votes

Answer:

-1

Explanation:

If the binomial is x + 1 = 0, then x = -1. That will be the number that goes "outside" and the leading coefficients will go "inside". We have only a leading coefficient on the x to the 4th power, but we have to allow for the x-cubed, x-squared, and x terms even though they are missing. We fill those coefficients in as 0's since they are missing:

-1| 1 0 0 0 -2

Now bring down the first number, 1, and multiply it by the -1, then put the product up under the first 0. I will do bold the sums so as to not confuse:

-1| 1 0 0 0 -2

-1

1

Now add the 0 and -1, multiply that sum by the -1, and put that product up under the second 0:

-1| 1 0 0 0 -2

-1 1

1 -1

Now add the 0 and the 1, multiply that sum by the -1, and put the product up under the last 0:

-1| 1 0 0 0 -2

-1 1 -1

1 -1 1

Now add the last 0 and the -1, multiply that sum by the -1, and put that product up under the -2 and add to get the remainder:

-1| 1 0 0 0 -2

-1 1 -1 1

1 -1 1 -1 -1

The remainder is -1

answered
User Leandro Poblet
by
8.0k points

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