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weeeeeb [17]
2 years ago
14

Write a polynomial function of the least degree that has roots of 3 and (4 + i).

Mathematics
1 answer:
polet [3.4K]2 years ago
4 0

Answer:

  • x³ - 11x² + 41x - 51

Step-by-step explanation:

The least number of degree is 3 and the third root should be (4 - i) to make polynomial rational.

<u>The polynomial is:</u>

  • (x - 3)(x - (4 + i))(x - (4 + i)) =
  • (x - 3)(x² -x(4 + i + 4 - i) + (4 + i)(4 - i)) =
  • (x - 3)(x² - 8x + 16 - (-1)) =
  • (x - 3)(x² - 8x + 17) =
  • x³ - 8x² + 17x - 3x² + 24x - 51 =
  • x³ - 11x² + 41x - 51
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ANSWER

P(B \: and \: C) =  \frac{1}{6}


EXPLANATION

Recall that,

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So we can now find
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We use the same formula again,

P(B \: and \: C) = P(B) \times P(C)
We substitute the values to get,


P(B \: and \: C) =  \frac{2}{3}  \times  \frac{1}{4}
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