0=-x^2+2400x-1240000

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Solution for 0=-x^2+2400x-1240000 equation:


Simplifying
0 = -1x2 + 2400x + -1240000

Reorder the terms:
0 = -1240000 + 2400x + -1x2

Solving
0 = -1240000 + 2400x + -1x2

Solving for variable 'x'.

Combine like terms: 0 + 1240000 = 1240000
1240000 + -2400x + x2 = -1240000 + 2400x + -1x2 + 1240000 + -2400x + x2

Reorder the terms:
1240000 + -2400x + x2 = -1240000 + 1240000 + 2400x + -2400x + -1x2 + x2

Combine like terms: -1240000 + 1240000 = 0
1240000 + -2400x + x2 = 0 + 2400x + -2400x + -1x2 + x2
1240000 + -2400x + x2 = 2400x + -2400x + -1x2 + x2

Combine like terms: 2400x + -2400x = 0
1240000 + -2400x + x2 = 0 + -1x2 + x2
1240000 + -2400x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
1240000 + -2400x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1240000' to each side of the equation.
1240000 + -2400x + -1240000 + x2 = 0 + -1240000

Reorder the terms:
1240000 + -1240000 + -2400x + x2 = 0 + -1240000

Combine like terms: 1240000 + -1240000 = 0
0 + -2400x + x2 = 0 + -1240000
-2400x + x2 = 0 + -1240000

Combine like terms: 0 + -1240000 = -1240000
-2400x + x2 = -1240000

The x term is -2400x.  Take half its coefficient (-1200).
Square it (1440000) and add it to both sides.

Add '1440000' to each side of the equation.
-2400x + 1440000 + x2 = -1240000 + 1440000

Reorder the terms:
1440000 + -2400x + x2 = -1240000 + 1440000

Combine like terms: -1240000 + 1440000 = 200000
1440000 + -2400x + x2 = 200000

Factor a perfect square on the left side:
(x + -1200)(x + -1200) = 200000

Calculate the square root of the right side: 447.2135955

Break this problem into two subproblems by setting 
(x + -1200) equal to 447.2135955 and -447.2135955.

Subproblem 1

x + -1200 = 447.2135955 Simplifying x + -1200 = 447.2135955 Reorder the terms: -1200 + x = 447.2135955 Solving -1200 + x = 447.2135955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1200' to each side of the equation. -1200 + 1200 + x = 447.2135955 + 1200 Combine like terms: -1200 + 1200 = 0 0 + x = 447.2135955 + 1200 x = 447.2135955 + 1200 Combine like terms: 447.2135955 + 1200 = 1647.2135955 x = 1647.2135955 Simplifying x = 1647.2135955

Subproblem 2

x + -1200 = -447.2135955 Simplifying x + -1200 = -447.2135955 Reorder the terms: -1200 + x = -447.2135955 Solving -1200 + x = -447.2135955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1200' to each side of the equation. -1200 + 1200 + x = -447.2135955 + 1200 Combine like terms: -1200 + 1200 = 0 0 + x = -447.2135955 + 1200 x = -447.2135955 + 1200 Combine like terms: -447.2135955 + 1200 = 752.7864045 x = 752.7864045 Simplifying x = 752.7864045

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1647.2135955, 752.7864045}

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