x^2-800x=-140000

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Solution for x^2-800x=-140000 equation:


Simplifying
x2 + -800x = -140000

Reorder the terms:
-800x + x2 = -140000

Solving
-800x + x2 = -140000

Solving for variable 'x'.

Reorder the terms:
140000 + -800x + x2 = -140000 + 140000

Combine like terms: -140000 + 140000 = 0
140000 + -800x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-140000' to each side of the equation.
140000 + -800x + -140000 + x2 = 0 + -140000

Reorder the terms:
140000 + -140000 + -800x + x2 = 0 + -140000

Combine like terms: 140000 + -140000 = 0
0 + -800x + x2 = 0 + -140000
-800x + x2 = 0 + -140000

Combine like terms: 0 + -140000 = -140000
-800x + x2 = -140000

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 = -140000 + 160000

Reorder the terms:
160000 + -800x + x2 = -140000 + 160000

Combine like terms: -140000 + 160000 = 20000
160000 + -800x + x2 = 20000

Factor a perfect square on the left side:
(x + -400)(x + -400) = 20000

Calculate the square root of the right side: 141.421356237

Break this problem into two subproblems by setting 
(x + -400) equal to 141.421356237 and -141.421356237.

Subproblem 1

x + -400 = 141.421356237 Simplifying x + -400 = 141.421356237 Reorder the terms: -400 + x = 141.421356237 Solving -400 + x = 141.421356237 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 = 141.421356237 + 400 Combine like terms: -400 + 400 = 0 0 + x = 141.421356237 + 400 x = 141.421356237 + 400 Combine like terms: 141.421356237 + 400 = 541.421356237 x = 541.421356237 Simplifying x = 541.421356237

Subproblem 2

x + -400 = -141.421356237 Simplifying x + -400 = -141.421356237 Reorder the terms: -400 + x = -141.421356237 Solving -400 + x = -141.421356237 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 = -141.421356237 + 400 Combine like terms: -400 + 400 = 0 0 + x = -141.421356237 + 400 x = -141.421356237 + 400 Combine like terms: -141.421356237 + 400 = 258.578643763 x = 258.578643763 Simplifying x = 258.578643763

Solution

The solution to the problem is based on the solutions from the subproblems. x = {541.421356237, 258.578643763}

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