# Solve Using the Quadratic Formula x^2=18x-81

Move all the expressions to the left side of the equation.
Subtract from both sides of the equation.
Add to both sides of the equation.
Use the quadratic formula to find the solutions.
Substitute the values , , and into the quadratic formula and solve for .
Simplify.
Simplify the numerator.
Raise to the power of .
Multiply by .
Multiply by .
Subtract from .
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
Multiply by .
Simplify .
Divide by .
The final answer is the combination of both solutions.
Double roots
Solve Using the Quadratic Formula x^2=18x-81