225=x^2-16x+68

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Solution for 225=x^2-16x+68 equation:


Simplifying
225 = x2 + -16x + 68

Reorder the terms:
225 = 68 + -16x + x2

Solving
225 = 68 + -16x + x2

Solving for variable 'x'.

Combine like terms: 225 + -68 = 157
157 + 16x + -1x2 = 68 + -16x + x2 + -68 + 16x + -1x2

Reorder the terms:
157 + 16x + -1x2 = 68 + -68 + -16x + 16x + x2 + -1x2

Combine like terms: 68 + -68 = 0
157 + 16x + -1x2 = 0 + -16x + 16x + x2 + -1x2
157 + 16x + -1x2 = -16x + 16x + x2 + -1x2

Combine like terms: -16x + 16x = 0
157 + 16x + -1x2 = 0 + x2 + -1x2
157 + 16x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
157 + 16x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-157 + -16x + x2 = 0

Move the constant term to the right:

Add '157' to each side of the equation.
-157 + -16x + 157 + x2 = 0 + 157

Reorder the terms:
-157 + 157 + -16x + x2 = 0 + 157

Combine like terms: -157 + 157 = 0
0 + -16x + x2 = 0 + 157
-16x + x2 = 0 + 157

Combine like terms: 0 + 157 = 157
-16x + x2 = 157

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 = 157 + 64

Reorder the terms:
64 + -16x + x2 = 157 + 64

Combine like terms: 157 + 64 = 221
64 + -16x + x2 = 221

Factor a perfect square on the left side:
(x + -8)(x + -8) = 221

Calculate the square root of the right side: 14.866068747

Break this problem into two subproblems by setting 
(x + -8) equal to 14.866068747 and -14.866068747.

Subproblem 1

x + -8 = 14.866068747 Simplifying x + -8 = 14.866068747 Reorder the terms: -8 + x = 14.866068747 Solving -8 + x = 14.866068747 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 = 14.866068747 + 8 Combine like terms: -8 + 8 = 0 0 + x = 14.866068747 + 8 x = 14.866068747 + 8 Combine like terms: 14.866068747 + 8 = 22.866068747 x = 22.866068747 Simplifying x = 22.866068747

Subproblem 2

x + -8 = -14.866068747 Simplifying x + -8 = -14.866068747 Reorder the terms: -8 + x = -14.866068747 Solving -8 + x = -14.866068747 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 = -14.866068747 + 8 Combine like terms: -8 + 8 = 0 0 + x = -14.866068747 + 8 x = -14.866068747 + 8 Combine like terms: -14.866068747 + 8 = -6.866068747 x = -6.866068747 Simplifying x = -6.866068747

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.866068747, -6.866068747}

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