Question 547335
<pre>
The zeros are 3i, -3i, 4, and 4

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

Multiply that all the way out and get:

f(x) = x<sup>4</sup> - 8x<sup>3</sup> + 25x<sup>2</sup> - 72x + 144  

Edwin</pre>