00:01
The first thing we're being asked to do in this problem is to subtract the two given polynomials.
00:04
Well, to subtract polynomials, first we have to remove both sets of parentheses.
00:09
Now, as you can see, there's nothing in front of the first set of parentheses, so we'll bring down those first three terms, 25y to the third minus 7 y squared plus 9y.
00:19
Now, in front of the second set of parentheses, we have a minus sign, which means we have to change the sign of each of those terms.
00:25
So the positive 14y squared becomes negative 14y squared, the negative 7y because positive 7y, and the positive 2 becomes negative 2.
00:36
Perfect.
00:37
Now we just have to combine late terms.
00:39
Well, the first term, 25y to the third, doesn't have a late term, so we'll just bring that down...