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Write a quadractic equation having given equations?

-9,9i

  • math -

    9i your welcome young solder

  • math -

    if you mean the given roots, you are out of luck if you want real coefficients.

    If you have a typo and meant -9+9i, then the other root is -9-9i, so the quadratic is

    (x-(-9+9i))(x-(-9-9i))
    = ((x-9)+9i)((x-9)-9i)
    = (x-9)^2 + 9^2
    = x^2 - 18x + 162

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