x^2-16x+36=0

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Solution for x^2-16x+36=0 equation:


Simplifying
x2 + -16x + 36 = 0

Reorder the terms:
36 + -16x + x2 = 0

Solving
36 + -16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-36' to each side of the equation.
36 + -16x + -36 + x2 = 0 + -36

Reorder the terms:
36 + -36 + -16x + x2 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -16x + x2 = 0 + -36
-16x + x2 = 0 + -36

Combine like terms: 0 + -36 = -36
-16x + x2 = -36

The x term is -16x.  Take half its coefficient (-8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
-16x + 64 + x2 = -36 + 64

Reorder the terms:
64 + -16x + x2 = -36 + 64

Combine like terms: -36 + 64 = 28
64 + -16x + x2 = 28

Factor a perfect square on the left side:
(x + -8)(x + -8) = 28

Calculate the square root of the right side: 5.291502622

Break this problem into two subproblems by setting 
(x + -8) equal to 5.291502622 and -5.291502622.

Subproblem 1

x + -8 = 5.291502622 Simplifying x + -8 = 5.291502622 Reorder the terms: -8 + x = 5.291502622 Solving -8 + x = 5.291502622 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = 5.291502622 + 8 Combine like terms: -8 + 8 = 0 0 + x = 5.291502622 + 8 x = 5.291502622 + 8 Combine like terms: 5.291502622 + 8 = 13.291502622 x = 13.291502622 Simplifying x = 13.291502622

Subproblem 2

x + -8 = -5.291502622 Simplifying x + -8 = -5.291502622 Reorder the terms: -8 + x = -5.291502622 Solving -8 + x = -5.291502622 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + x = -5.291502622 + 8 Combine like terms: -8 + 8 = 0 0 + x = -5.291502622 + 8 x = -5.291502622 + 8 Combine like terms: -5.291502622 + 8 = 2.708497378 x = 2.708497378 Simplifying x = 2.708497378

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.291502622, 2.708497378}

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