x^2-32x+81=0

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Solution for x^2-32x+81=0 equation:


Simplifying
x2 + -32x + 81 = 0

Reorder the terms:
81 + -32x + x2 = 0

Solving
81 + -32x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-81' to each side of the equation.
81 + -32x + -81 + x2 = 0 + -81

Reorder the terms:
81 + -81 + -32x + x2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -32x + x2 = 0 + -81
-32x + x2 = 0 + -81

Combine like terms: 0 + -81 = -81
-32x + x2 = -81

The x term is -32x.  Take half its coefficient (-16).
Square it (256) and add it to both sides.

Add '256' to each side of the equation.
-32x + 256 + x2 = -81 + 256

Reorder the terms:
256 + -32x + x2 = -81 + 256

Combine like terms: -81 + 256 = 175
256 + -32x + x2 = 175

Factor a perfect square on the left side:
(x + -16)(x + -16) = 175

Calculate the square root of the right side: 13.228756555

Break this problem into two subproblems by setting 
(x + -16) equal to 13.228756555 and -13.228756555.

Subproblem 1

x + -16 = 13.228756555 Simplifying x + -16 = 13.228756555 Reorder the terms: -16 + x = 13.228756555 Solving -16 + x = 13.228756555 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = 13.228756555 + 16 Combine like terms: -16 + 16 = 0 0 + x = 13.228756555 + 16 x = 13.228756555 + 16 Combine like terms: 13.228756555 + 16 = 29.228756555 x = 29.228756555 Simplifying x = 29.228756555

Subproblem 2

x + -16 = -13.228756555 Simplifying x + -16 = -13.228756555 Reorder the terms: -16 + x = -13.228756555 Solving -16 + x = -13.228756555 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = -13.228756555 + 16 Combine like terms: -16 + 16 = 0 0 + x = -13.228756555 + 16 x = -13.228756555 + 16 Combine like terms: -13.228756555 + 16 = 2.771243445 x = 2.771243445 Simplifying x = 2.771243445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {29.228756555, 2.771243445}

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