x^2=114x+399

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


Simplifying
x2 = 114x + 399

Reorder the terms:
x2 = 399 + 114x

Solving
x2 = 399 + 114x

Solving for variable 'x'.

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

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

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

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

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 = 3648
3249 + -114x + x2 = 3648

Factor a perfect square on the left side:
(x + -57)(x + -57) = 3648

Calculate the square root of the right side: 60.398675482

Break this problem into two subproblems by setting 
(x + -57) equal to 60.398675482 and -60.398675482.

Subproblem 1

x + -57 = 60.398675482 Simplifying x + -57 = 60.398675482 Reorder the terms: -57 + x = 60.398675482 Solving -57 + x = 60.398675482 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 = 60.398675482 + 57 Combine like terms: -57 + 57 = 0 0 + x = 60.398675482 + 57 x = 60.398675482 + 57 Combine like terms: 60.398675482 + 57 = 117.398675482 x = 117.398675482 Simplifying x = 117.398675482

Subproblem 2

x + -57 = -60.398675482 Simplifying x + -57 = -60.398675482 Reorder the terms: -57 + x = -60.398675482 Solving -57 + x = -60.398675482 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 = -60.398675482 + 57 Combine like terms: -57 + 57 = 0 0 + x = -60.398675482 + 57 x = -60.398675482 + 57 Combine like terms: -60.398675482 + 57 = -3.398675482 x = -3.398675482 Simplifying x = -3.398675482

Solution

The solution to the problem is based on the solutions from the subproblems. x = {117.398675482, -3.398675482}

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