00:01
Okay, here we're else to find a degree three polynomial that has the following zeros, 1, negative 2, and 3.
00:07
And then we need the coefficient of x squared to be 3.
00:17
Okay, so quite a few stipulations here.
00:19
We're going to start with the zeros.
00:21
So we're going to say p of x.
00:26
Let's go ahead and throw these zeros into our parentheses.
00:29
So the 1 will go in as x minus 1.
00:31
The negative 2 will go in as x plus 2, and then the 3 will go in as x minus 3.
00:38
Now, we're going to multiply these together, so i'll start with these first two.
00:42
When i multiply those together, i should get x squared plus x minus 2.
00:48
We're going to multiply that together with the x minus 3.
00:50
That should give us x cubed minus 3x squared plus x squared minus 3x, minus 2x, plus 6, minus 3x, minus 2x, plus 6, so that's x cubed minus 2x squared minus 5x plus 6.
01:10
Okay.
01:11
Now we can come to the second condition that the coefficient has to be of x squared has to be 3.
01:18
So in order to get the coefficient of x squared to be 3, right now it's 2...