And then you take that, the cube root of that, you're gonna have negative. And then you have a negative value divided by that, you're gonna get a positive value. So you can feel good that this test value is indicative of actually this entire interval. And if you're dealing with a positive value, well, that to the fifth power is gonna be positive cube root of that's still going to be positive. But then you're gonna have negative 2 9ths divided by that positive value. So this is going to be negative. So it is indeed the case that our concavity of g switches as we cross x equals zero.