Second derivative is one of the profound things of the exponential function. The second derivative here is also e to the x. And so if I have, so the second derivative, let me just do it in those same colors. So the second derivative is going to be e to the x, e to the x plus two times e to the x, plus two times e to the x, is indeed going to be equal to three times e to the x, three times e to the x. This is absolutely going to be true. E to the x plus two to the x is three e to the x. So y two is also a solution to this differential equation.