-.5x^2-12.5x+25=-200

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Solution for -.5x^2-12.5x+25=-200 equation:


Simplifying
-0.5x2 + -12.5x + 25 = -200

Reorder the terms:
25 + -12.5x + -0.5x2 = -200

Solving
25 + -12.5x + -0.5x2 = -200

Solving for variable 'x'.

Reorder the terms:
25 + 200 + -12.5x + -0.5x2 = -200 + 200

Combine like terms: 25 + 200 = 225
225 + -12.5x + -0.5x2 = -200 + 200

Combine like terms: -200 + 200 = 0
225 + -12.5x + -0.5x2 = 0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
-450 + 25x + x2 = 0

Move the constant term to the right:

Add '450' to each side of the equation.
-450 + 25x + 450 + x2 = 0 + 450

Reorder the terms:
-450 + 450 + 25x + x2 = 0 + 450

Combine like terms: -450 + 450 = 0
0 + 25x + x2 = 0 + 450
25x + x2 = 0 + 450

Combine like terms: 0 + 450 = 450
25x + x2 = 450

The x term is 25x.  Take half its coefficient (12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
25x + 156.25 + x2 = 450 + 156.25

Reorder the terms:
156.25 + 25x + x2 = 450 + 156.25

Combine like terms: 450 + 156.25 = 606.25
156.25 + 25x + x2 = 606.25

Factor a perfect square on the left side:
(x + 12.5)(x + 12.5) = 606.25

Calculate the square root of the right side: 24.622144504

Break this problem into two subproblems by setting 
(x + 12.5) equal to 24.622144504 and -24.622144504.

Subproblem 1

x + 12.5 = 24.622144504 Simplifying x + 12.5 = 24.622144504 Reorder the terms: 12.5 + x = 24.622144504 Solving 12.5 + x = 24.622144504 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = 24.622144504 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = 24.622144504 + -12.5 x = 24.622144504 + -12.5 Combine like terms: 24.622144504 + -12.5 = 12.122144504 x = 12.122144504 Simplifying x = 12.122144504

Subproblem 2

x + 12.5 = -24.622144504 Simplifying x + 12.5 = -24.622144504 Reorder the terms: 12.5 + x = -24.622144504 Solving 12.5 + x = -24.622144504 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.5' to each side of the equation. 12.5 + -12.5 + x = -24.622144504 + -12.5 Combine like terms: 12.5 + -12.5 = 0.0 0.0 + x = -24.622144504 + -12.5 x = -24.622144504 + -12.5 Combine like terms: -24.622144504 + -12.5 = -37.122144504 x = -37.122144504 Simplifying x = -37.122144504

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.122144504, -37.122144504}

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