Verified Solution Mathematics Polynomials

If alpha and beta are the zeros of the polynomial 2x² - x - 6, then a polynomial whose zeros are 1/alpha and 1/beta is:

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Solution ✔ Verified
  • A6x² + x - 2
  • B6x² - x - 2
  • C6x² - x + 2
  • D2x² - x - 6
Explanation

For 2x² - x - 6, alpha + beta = 1/2 and alpha * beta = -6/2 = -3.

For the new polynomial, sum of zeros = 1/alpha + 1/beta = (alpha + beta) / (alpha * beta) = (1/2) / (-3) = -1/6.

Product of zeros = 1/(alpha * beta) = 1/(-3) = -1/3.

The new polynomial is k(x² - (-1/6)x + (-1/3)) = k(x² + (1/6)x - 1/3). Taking k=6, we get 6x² + x - 2.

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