I could also look for critical points where the derivative is undefined, but this derivative is defined, especially throughout my domain of x that I care about, between zero and 10. So I could try to factor this or try to simplify this a little bit, but I'm just gonna cut to the chase and try to use the quadratic formula here. So this is the x's that satisfy this. It's going to be, x is going to be equal to, so negative b, so it's 200, negative negative 200 is positive 200, plus or minus the square root of b squared, which is negative 200 squared, so I could just write that as 200 squared. Doesn't matter if it's negative 200 squared or 200 squared, I'm gonna get the same value. So, let me give myself some more space. So negative 200 squared, well that's going to be four with four zeros.