x^2-114x+399=0

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Solution for x^2-114x+399=0 equation:


Simplifying
x2 + -114x + 399 = 0

Reorder the terms:
399 + -114x + x2 = 0

Solving
399 + -114x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-399' to each side of the equation.
399 + -114x + -399 + x2 = 0 + -399

Reorder the terms:
399 + -399 + -114x + x2 = 0 + -399

Combine like terms: 399 + -399 = 0
0 + -114x + x2 = 0 + -399
-114x + x2 = 0 + -399

Combine like terms: 0 + -399 = -399
-114x + x2 = -399

The x term is -114x.  Take half its coefficient (-57).
Square it (3249) and add it to both sides.

Add '3249' to each side of the equation.
-114x + 3249 + x2 = -399 + 3249

Reorder the terms:
3249 + -114x + x2 = -399 + 3249

Combine like terms: -399 + 3249 = 2850
3249 + -114x + x2 = 2850

Factor a perfect square on the left side:
(x + -57)(x + -57) = 2850

Calculate the square root of the right side: 53.38539126

Break this problem into two subproblems by setting 
(x + -57) equal to 53.38539126 and -53.38539126.

Subproblem 1

x + -57 = 53.38539126 Simplifying x + -57 = 53.38539126 Reorder the terms: -57 + x = 53.38539126 Solving -57 + x = 53.38539126 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '57' to each side of the equation. -57 + 57 + x = 53.38539126 + 57 Combine like terms: -57 + 57 = 0 0 + x = 53.38539126 + 57 x = 53.38539126 + 57 Combine like terms: 53.38539126 + 57 = 110.38539126 x = 110.38539126 Simplifying x = 110.38539126

Subproblem 2

x + -57 = -53.38539126 Simplifying x + -57 = -53.38539126 Reorder the terms: -57 + x = -53.38539126 Solving -57 + x = -53.38539126 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '57' to each side of the equation. -57 + 57 + x = -53.38539126 + 57 Combine like terms: -57 + 57 = 0 0 + x = -53.38539126 + 57 x = -53.38539126 + 57 Combine like terms: -53.38539126 + 57 = 3.61460874 x = 3.61460874 Simplifying x = 3.61460874

Solution

The solution to the problem is based on the solutions from the subproblems. x = {110.38539126, 3.61460874}

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