Posted by **tan** on Thursday, November 15, 2012 at 2:54pm.

Write a quadractic equation having given equations?

-9,9i

- math -
**nerd45623**, Thursday, November 15, 2012 at 3:39pm
9i your welcome young solder

- math -
**Steve**, Thursday, November 15, 2012 at 4:00pm
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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