x^2-72x+256=0

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Solution for x^2-72x+256=0 equation:


Simplifying
x2 + -72x + 256 = 0

Reorder the terms:
256 + -72x + x2 = 0

Solving
256 + -72x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-256' to each side of the equation.
256 + -72x + -256 + x2 = 0 + -256

Reorder the terms:
256 + -256 + -72x + x2 = 0 + -256

Combine like terms: 256 + -256 = 0
0 + -72x + x2 = 0 + -256
-72x + x2 = 0 + -256

Combine like terms: 0 + -256 = -256
-72x + x2 = -256

The x term is -72x.  Take half its coefficient (-36).
Square it (1296) and add it to both sides.

Add '1296' to each side of the equation.
-72x + 1296 + x2 = -256 + 1296

Reorder the terms:
1296 + -72x + x2 = -256 + 1296

Combine like terms: -256 + 1296 = 1040
1296 + -72x + x2 = 1040

Factor a perfect square on the left side:
(x + -36)(x + -36) = 1040

Calculate the square root of the right side: 32.249030993

Break this problem into two subproblems by setting 
(x + -36) equal to 32.249030993 and -32.249030993.

Subproblem 1

x + -36 = 32.249030993 Simplifying x + -36 = 32.249030993 Reorder the terms: -36 + x = 32.249030993 Solving -36 + x = 32.249030993 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '36' to each side of the equation. -36 + 36 + x = 32.249030993 + 36 Combine like terms: -36 + 36 = 0 0 + x = 32.249030993 + 36 x = 32.249030993 + 36 Combine like terms: 32.249030993 + 36 = 68.249030993 x = 68.249030993 Simplifying x = 68.249030993

Subproblem 2

x + -36 = -32.249030993 Simplifying x + -36 = -32.249030993 Reorder the terms: -36 + x = -32.249030993 Solving -36 + x = -32.249030993 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '36' to each side of the equation. -36 + 36 + x = -32.249030993 + 36 Combine like terms: -36 + 36 = 0 0 + x = -32.249030993 + 36 x = -32.249030993 + 36 Combine like terms: -32.249030993 + 36 = 3.750969007 x = 3.750969007 Simplifying x = 3.750969007

Solution

The solution to the problem is based on the solutions from the subproblems. x = {68.249030993, 3.750969007}

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