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January 28, 2015

January 28, 2015

Posted by **Shin** on Tuesday, May 21, 2013 at 11:08am.

- Math (Algebra) -
**Steve**, Tuesday, May 21, 2013 at 11:14amcomplex roots always come in conjugate pairs. So,

f(x) = (x-(4-i))(x-(4+i))(x-(2+3i))(x-(2-3i))

= ((x-4)^2 + 1^2)((x-2)^2 + 3^2)

= (x^2-8x+17)(x^2-4x+13)

= x^4 - 12x^3 + 62x^2 - 172x + 221

...

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