Solve $$$y^{2} = 81$$$ for $$$y$$$ (real roots)

The calculator will try to solve the equation $$$y^{2} = 81$$$ for $$$y$$$ (find the real roots) on the interval $$$\left(-\infty, \infty\right)$$$.

Solve the equation $$$y^{2} = 81$$$ for $$$y$$$ on the interval $$$\left(-\infty, \infty\right)$$$.

$$$y = -9$$$A

$$$y = 9$$$A