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# complex numbers need help watch

1. One root of z^3 - 15z^2 + 76z - 140=0 is an integer. Solve the equation.
2. z = 7 is the integer solution (I've cheated here, but the way to do it is to guess factors of the constant term, in this case -140. In particular, 7 is a factor of -140).
3. (Original post by Swayum)
z = 7 is the integer solution (I've cheated here, but the way to do it is to guess factors of the constant term, in this case -140. In particular, 7 is a factor of -140).
Thanks

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Updated: September 26, 2010
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