What is the remainder when 3 is synthetically divided into the polynomial -x2 + 5x - 9?A.0B.-6C.-3D.5SUBMITarrow_backPREVIOUS
Question
What is the remainder when 3 is synthetically divided into the polynomial -x² + 5x - 9?
A. 0
B. -6
C. -3
D. 5
Solution
To solve this problem, we will use synthetic division. Here are the steps:
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Write down the coefficients of the polynomial. For -x^2 + 5x - 9, the coefficients are -1, 5, and -9.
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Write down the number you are dividing by, which is 3, to the left of a vertical line. To the right of this line, write down the coefficients from step 1.
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Bring down the first coefficient (-1) to the bottom row.
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Multiply the number you just wrote down by the number you are dividing by (3). Write this result (-3) under the second coefficient (5).
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Add the numbers in this column together (5 + -3 = 2) and write the result in the bottom row.
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Repeat steps 4 and 5 for the rest of the coefficients. Multiply 2 (the number you just wrote down) by 3 (the number you are dividing by) to get 6. Write this under the next coefficient (-9). Add these together to get -3.
So, the remainder when 3 is synthetically divided into the polynomial -x^2 + 5x - 9 is -3. Therefore, the answer is C. -3.
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