00:01
We're asking to subtract the two given polynomials.
00:03
So the first thing we need to do is get each of the terms out of the parentheses.
00:07
Notice there's nothing in front of the first set of parentheses.
00:09
So we're just going to bring each of those terms down, the 4x to the 4th plus 2x squared minus 9.
00:15
However, in front of the second set of the parentheses, we have our minus 9.
00:19
So that needs to get distributed to each terms.
00:22
While distributing a negative just means to take the opposite of that term.
00:26
Well, the opposite of the positive x to the 4th is negative x to the 4th.
00:30
The opposite of negative 2x squared is positive 2x squared, and the opposite of negative 5 is positive 5.
00:37
Now we just have to combine like terms...