Posted by Hawra on Saturday, March 13, 2010 at 4:18pm.
form a polynomial f(x) with real coefficients having the given degree and zeros.
degree: 4; zeros: 1, 2, and 12i.
I got an exam tomorrow, i would appreciate any kind of help, thank you.

precalculus  Reiny, Saturday, March 13, 2010 at 6:55pm
You are given 2 real roots and one complex.
As I noted before, complex numbers come in pairs,
so there has to be another one, 1+2i
so we have
f(x) = (x+1)(x2)(x12i)(x1+2i)
multiply the last two brackets, the i's will drop out

precalculus  hawra, Saturday, March 13, 2010 at 8:08pm
thank you again, life saver
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