Tuesday
September 30, 2014

Homework Help: Algebra II

Posted by Nick on Thursday, December 13, 2007 at 7:41pm.

Solve x^4 - 12x - 5 = 0 given that -1 + 2i is a root.

Iíve used synthetic division to get the answers x = 1 +/- 2i , 1 +/- sqrt 2

Iíve having trouble checking the answers though because of that imaginary number. How can I check these kind of problems?

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