00:01
Okay, so we have our zeros up here that are negative 3, negative 1, 2, and 5, and we need our polynomial function to be of degree 4.
00:11
So what i'd like to do is just make this a product of factors.
00:18
So we have each factor being an x minus our zeros, and this will guarantee that each zero in our equation does actually make our f of x.
00:33
X equal to 0.
00:35
So that means f of negative 3 for this equation is 0, f of negative 1 is 0, f of 2 is 0, and f of 5 is 0.
00:43
And the reason that that's guaranteed is because each of these factors are multiplied together and in each of these factors is a subtraction of x by that factor.
00:55
So when x is equal to that factor, it is subtracting itself from itself, which will always give you 0.
01:03
Now we just need to make sure, after i simplify this, that this is of degree four...