00:01
All righty, we have x squared plus 1 to the 4th power, n is going to be 4, and we're going to start with r equals 0.
00:08
So 4 factorial over 0 factorial, 4 minus 0 is just 4.
00:19
And so we'll have x squared to the 4th power, and 1 to the 0 power.
00:28
Next, we'll have r equals 1, 4 minus 1 is 3.
00:32
So we'll have x squared to the third power times 1 to the first power, plus 4 factorial, now we'll have r equals 2.
00:47
2 minus 2 is, or 4 minus 2 is 2 is 2.
00:50
We'll have x squared to the second power, y is also to the second power, plus 4 factorial third power, or r equals 3.
01:05
So we'll have x squared to the first power.
01:13
Y is going to be to the third power.
01:15
Last one, four factorial, over four factorial, zero factorial, x squared to two, the zero, and one to the fourth power.
01:30
And i just realized, oops, i just realized i was writing my y's incorrectly.
01:42
So that should be one squared, that should be one cubed.
01:51
Now time to start simplifying.
01:54
That becomes one, that becomes one, that becomes one...