Move .

Multiply by .

Subtract from 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 the numerator.

Apply the product rule to .

Raise to the power of .

Multiply by .

Multiply by .

Multiply by .

Add and .

Pull terms out from under the radical, assuming positive real numbers.

Multiply by .

The final answer is the combination of both solutions.

Solve for m 865mm=cm