posted by Breanna .
Form a polynomial f(x) with real coeffiecients having the given degree and zeros.
degree 4, zeros 3, multiplicity 2; 6i
Can someone show how to do this. I have tried and do not have a clue. I am lost!!! So, please show work.
by the time you get to calculus, you should know how to use the roots to form a polynomial. If you tried, you should show what you have tried, and where you got stuck.
If a is a root of f(x)=0, (x-a) is a factor of f(x).
Since complex roots come in pairs, -6i is also a root, so
f(x) = (x-3)(x-3)(x-6i)(x+6i)
= (x-3)^2 (x^2+36)
saying you do not have a clue indicates either
a) you have woefully neglected your studies, or
b) you are just lazy and want someone else to do your work, or
(c) both of the above.