x^2+59x+400=0

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Solution for x^2+59x+400=0 equation:


Simplifying
x2 + 59x + 400 = 0

Reorder the terms:
400 + 59x + x2 = 0

Solving
400 + 59x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-400' to each side of the equation.
400 + 59x + -400 + x2 = 0 + -400

Reorder the terms:
400 + -400 + 59x + x2 = 0 + -400

Combine like terms: 400 + -400 = 0
0 + 59x + x2 = 0 + -400
59x + x2 = 0 + -400

Combine like terms: 0 + -400 = -400
59x + x2 = -400

The x term is 59x.  Take half its coefficient (29.5).
Square it (870.25) and add it to both sides.

Add '870.25' to each side of the equation.
59x + 870.25 + x2 = -400 + 870.25

Reorder the terms:
870.25 + 59x + x2 = -400 + 870.25

Combine like terms: -400 + 870.25 = 470.25
870.25 + 59x + x2 = 470.25

Factor a perfect square on the left side:
(x + 29.5)(x + 29.5) = 470.25

Calculate the square root of the right side: 21.685248442

Break this problem into two subproblems by setting 
(x + 29.5) equal to 21.685248442 and -21.685248442.

Subproblem 1

x + 29.5 = 21.685248442 Simplifying x + 29.5 = 21.685248442 Reorder the terms: 29.5 + x = 21.685248442 Solving 29.5 + x = 21.685248442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-29.5' to each side of the equation. 29.5 + -29.5 + x = 21.685248442 + -29.5 Combine like terms: 29.5 + -29.5 = 0.0 0.0 + x = 21.685248442 + -29.5 x = 21.685248442 + -29.5 Combine like terms: 21.685248442 + -29.5 = -7.814751558 x = -7.814751558 Simplifying x = -7.814751558

Subproblem 2

x + 29.5 = -21.685248442 Simplifying x + 29.5 = -21.685248442 Reorder the terms: 29.5 + x = -21.685248442 Solving 29.5 + x = -21.685248442 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-29.5' to each side of the equation. 29.5 + -29.5 + x = -21.685248442 + -29.5 Combine like terms: 29.5 + -29.5 = 0.0 0.0 + x = -21.685248442 + -29.5 x = -21.685248442 + -29.5 Combine like terms: -21.685248442 + -29.5 = -51.185248442 x = -51.185248442 Simplifying x = -51.185248442

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-7.814751558, -51.185248442}

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