-x^2+800x-2300=110000

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Solution for -x^2+800x-2300=110000 equation:


Simplifying
-1x2 + 800x + -2300 = 110000

Reorder the terms:
-2300 + 800x + -1x2 = 110000

Solving
-2300 + 800x + -1x2 = 110000

Solving for variable 'x'.

Reorder the terms:
-2300 + -110000 + 800x + -1x2 = 110000 + -110000

Combine like terms: -2300 + -110000 = -112300
-112300 + 800x + -1x2 = 110000 + -110000

Combine like terms: 110000 + -110000 = 0
-112300 + 800x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
112300 + -800x + x2 = 0

Move the constant term to the right:

Add '-112300' to each side of the equation.
112300 + -800x + -112300 + x2 = 0 + -112300

Reorder the terms:
112300 + -112300 + -800x + x2 = 0 + -112300

Combine like terms: 112300 + -112300 = 0
0 + -800x + x2 = 0 + -112300
-800x + x2 = 0 + -112300

Combine like terms: 0 + -112300 = -112300
-800x + x2 = -112300

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 = -112300 + 160000

Reorder the terms:
160000 + -800x + x2 = -112300 + 160000

Combine like terms: -112300 + 160000 = 47700
160000 + -800x + x2 = 47700

Factor a perfect square on the left side:
(x + -400)(x + -400) = 47700

Calculate the square root of the right side: 218.403296678

Break this problem into two subproblems by setting 
(x + -400) equal to 218.403296678 and -218.403296678.

Subproblem 1

x + -400 = 218.403296678 Simplifying x + -400 = 218.403296678 Reorder the terms: -400 + x = 218.403296678 Solving -400 + x = 218.403296678 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 = 218.403296678 + 400 Combine like terms: -400 + 400 = 0 0 + x = 218.403296678 + 400 x = 218.403296678 + 400 Combine like terms: 218.403296678 + 400 = 618.403296678 x = 618.403296678 Simplifying x = 618.403296678

Subproblem 2

x + -400 = -218.403296678 Simplifying x + -400 = -218.403296678 Reorder the terms: -400 + x = -218.403296678 Solving -400 + x = -218.403296678 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 = -218.403296678 + 400 Combine like terms: -400 + 400 = 0 0 + x = -218.403296678 + 400 x = -218.403296678 + 400 Combine like terms: -218.403296678 + 400 = 181.596703322 x = 181.596703322 Simplifying x = 181.596703322

Solution

The solution to the problem is based on the solutions from the subproblems. x = {618.403296678, 181.596703322}

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