X2=81

To solve the equation \( x^2 = 81 \), you can take the square root of both sides.

1. Take the square root of both sides: \[ x = \pm \sqrt{81} \]

2. Since the square root of \( 81 \) is \( 9 \), the solutions will be: \[ x = 9 \quad \text{or} \quad x = -9 \]

So, the solutions to the equation \( x^2 = 81 \) are \( x = 9 \) and \( x = -9 \).