112100=-x^2-800x

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Solution for 112100=-x^2-800x equation:


Simplifying
112100 = -1x2 + -800x

Reorder the terms:
112100 = -800x + -1x2

Solving
112100 = -800x + -1x2

Solving for variable 'x'.

Reorder the terms:
112100 + 800x + x2 = -800x + 800x + -1x2 + x2

Combine like terms: -800x + 800x = 0
112100 + 800x + x2 = 0 + -1x2 + x2
112100 + 800x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
112100 + 800x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-112100' to each side of the equation.
112100 + 800x + -112100 + x2 = 0 + -112100

Reorder the terms:
112100 + -112100 + 800x + x2 = 0 + -112100

Combine like terms: 112100 + -112100 = 0
0 + 800x + x2 = 0 + -112100
800x + x2 = 0 + -112100

Combine like terms: 0 + -112100 = -112100
800x + x2 = -112100

The x term is 800x.  Take half its coefficient (400).
Square it (160000) and add it to both sides.

Add '160000' to each side of the equation.
800x + 160000 + x2 = -112100 + 160000

Reorder the terms:
160000 + 800x + x2 = -112100 + 160000

Combine like terms: -112100 + 160000 = 47900
160000 + 800x + x2 = 47900

Factor a perfect square on the left side:
(x + 400)(x + 400) = 47900

Calculate the square root of the right side: 218.860686282

Break this problem into two subproblems by setting 
(x + 400) equal to 218.860686282 and -218.860686282.

Subproblem 1

x + 400 = 218.860686282 Simplifying x + 400 = 218.860686282 Reorder the terms: 400 + x = 218.860686282 Solving 400 + x = 218.860686282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-400' to each side of the equation. 400 + -400 + x = 218.860686282 + -400 Combine like terms: 400 + -400 = 0 0 + x = 218.860686282 + -400 x = 218.860686282 + -400 Combine like terms: 218.860686282 + -400 = -181.139313718 x = -181.139313718 Simplifying x = -181.139313718

Subproblem 2

x + 400 = -218.860686282 Simplifying x + 400 = -218.860686282 Reorder the terms: 400 + x = -218.860686282 Solving 400 + x = -218.860686282 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-400' to each side of the equation. 400 + -400 + x = -218.860686282 + -400 Combine like terms: 400 + -400 = 0 0 + x = -218.860686282 + -400 x = -218.860686282 + -400 Combine like terms: -218.860686282 + -400 = -618.860686282 x = -618.860686282 Simplifying x = -618.860686282

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-181.139313718, -618.860686282}

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