# What are the solutions to the equation x^2 = -x+ 72?

1.)${x}^{2} = - x + 72$
2.)${x}^{2} + x = 72$
3.)${x}^{2} + x - 72 = 0$
4.)$\left(x + 9\right) \left(x - 8\right) = 0$