00:01
All right, so on this problem, all that was given was this equation.
00:04
So i'm assuming we just have to solve it.
00:07
I'm not sure.
00:08
It's already set equal to zero.
00:10
So what we want to do is we want to factor.
00:13
X squared is a common factor.
00:16
When i bring that out in front, i wind up with x squared plus 3x minus 4.
00:25
This still equals zero.
00:27
Now, in the parentheses, this right here, i can factor that down.
00:33
To x plus four and x minus one a positive four and a negative one multiply it a negative four but they add up to a positive three i still have the x squared in front equals zero so i have everything factored so i now i'm going to set each factor equal to zero so x squared equals zero and then i'm going to write x plus four equals zero and then i got x minus one equals zero so i just take every factor and set it equal to zero all right so when we take the square root to solve for x on this first one x equals x equals zero now if you were graphic this is going to be what's called a double root or a double zero there's a multiplicity of two for the zero so really this is zero multiplicity two i don't know if you need that.
01:41
But what that means is if we were graphing this, that would be a place where the graph hits the x -axis...