00:01
The first thing we're being asked to do is to subtract the two given polynomials.
00:04
Well, when you subtract polynomials, first you want to remove each term out of the preemphasis.
00:09
As you can see, there's nothing in front of the first set of preemphasies.
00:13
So we're going to bring down those first four terms, 3y to the third minus 7y squared plus 8y minus 4.
00:21
Now in front of the second set of parentheses, we have that minus sign, which means we have to change the sign of each term in the second set of parentheses.
00:28
So the positive 14y to the third becomes negative 14y to the third, the negative 8y becomes positive 8y, and the positive 9y squared becomes negative 9y squared.
00:41
Okay, now we just need to combine like terms.
00:44
First, i'll combine the y to the third terms...