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tankabanditka [31]
2 years ago
11

2x

Mathematics
1 answer:
laiz [17]2 years ago
3 0

Answer:

7

Step-by-step explanation:

2x² - 28x + 98 = 0

x² - 14x + 49 = 0

(x - 7)² = 0

x = 7

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We know for our problem that one of the roots of our polynomial is -3, so lets set -3 equal tox and factor backwards:
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We also know that another root of our polynomial is 1+ \sqrt{2}, so lets set 1+ \sqrt{2} equal to x and factor backwards:
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((x-(1+ \sqrt{2} )) is a factor of our polynomial.

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