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April 21, 2014

April 21, 2014

Posted by **Jill** on Saturday, April 7, 2012 at 10:16pm.

- math -
**Reiny**, Saturday, April 7, 2012 at 10:49pmcomplex roots always come in pairs, so the other root is -5 - 7i

sum of roots = (-5+7i) + (-5-7i) = -10

product of roots = (-5+7i)(-5-7i)

= 25 - 49i^2 = 25+49 = 74

equation:

x^2 + 10x + 74 = 0

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