00:01
Find a polynomial function with the zeros of negative 1 and 1.
00:05
Both have multiplicity of 2, and the graph passes through the point negative 2, 18.
00:10
That means that negative 1 is a 0, not once, but twice.
00:15
And 1 is a 0, not once but twice.
00:18
So that means x equals negative 1 twice, and x equals 1 twice.
00:24
So that means x minus 1 equals 0, x minus 1, i'm sorry, x plus 1 equals 0.
00:30
X minus 1 equals 0, x minus 1 equals 0.
00:34
Those are our factors.
00:37
X plus 1, x plus 1, x minus 1, x minus 1.
00:43
Now we're also going to have a greatest common factor here of a, but we don't know what that is yet.
00:51
I'm going to find that out by putting negative 2 in place of x and then putting 18 in place of y.
01:00
Y and then everywhere i see x i'm going to put negative 2...