You can
put this solution on YOUR website!You need to remember the 'difference of two squares' factorization:
What we want to accomplish is to get that pesky i out of our denominator. Using the difference of two squares idea, we see that we can accomplish this quite nicely by multiplying the denominator by
. Of course if we multiply the denominator by something, we must multiply the numerator by the same thing, so:
Using the difference of two squares on the denominator, and FOIL on the numerator we obtain:
.
Now, collect terms remembering that
.
In
form you have:
