-x^2+860x-2500=0

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Solution for -x^2+860x-2500=0 equation:


Simplifying
-1x2 + 860x + -2500 = 0

Reorder the terms:
-2500 + 860x + -1x2 = 0

Solving
-2500 + 860x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
2500 + -860x + x2 = 0

Move the constant term to the right:

Add '-2500' to each side of the equation.
2500 + -860x + -2500 + x2 = 0 + -2500

Reorder the terms:
2500 + -2500 + -860x + x2 = 0 + -2500

Combine like terms: 2500 + -2500 = 0
0 + -860x + x2 = 0 + -2500
-860x + x2 = 0 + -2500

Combine like terms: 0 + -2500 = -2500
-860x + x2 = -2500

The x term is -860x.  Take half its coefficient (-430).
Square it (184900) and add it to both sides.

Add '184900' to each side of the equation.
-860x + 184900 + x2 = -2500 + 184900

Reorder the terms:
184900 + -860x + x2 = -2500 + 184900

Combine like terms: -2500 + 184900 = 182400
184900 + -860x + x2 = 182400

Factor a perfect square on the left side:
(x + -430)(x + -430) = 182400

Calculate the square root of the right side: 427.083130081

Break this problem into two subproblems by setting 
(x + -430) equal to 427.083130081 and -427.083130081.

Subproblem 1

x + -430 = 427.083130081 Simplifying x + -430 = 427.083130081 Reorder the terms: -430 + x = 427.083130081 Solving -430 + x = 427.083130081 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '430' to each side of the equation. -430 + 430 + x = 427.083130081 + 430 Combine like terms: -430 + 430 = 0 0 + x = 427.083130081 + 430 x = 427.083130081 + 430 Combine like terms: 427.083130081 + 430 = 857.083130081 x = 857.083130081 Simplifying x = 857.083130081

Subproblem 2

x + -430 = -427.083130081 Simplifying x + -430 = -427.083130081 Reorder the terms: -430 + x = -427.083130081 Solving -430 + x = -427.083130081 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '430' to each side of the equation. -430 + 430 + x = -427.083130081 + 430 Combine like terms: -430 + 430 = 0 0 + x = -427.083130081 + 430 x = -427.083130081 + 430 Combine like terms: -427.083130081 + 430 = 2.916869919 x = 2.916869919 Simplifying x = 2.916869919

Solution

The solution to the problem is based on the solutions from the subproblems. x = {857.083130081, 2.916869919}

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