-x^2+25x+625=0

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Solution for -x^2+25x+625=0 equation:


Simplifying
-1x2 + 25x + 625 = 0

Reorder the terms:
625 + 25x + -1x2 = 0

Solving
625 + 25x + -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'.
-625 + -25x + x2 = 0

Move the constant term to the right:

Add '625' to each side of the equation.
-625 + -25x + 625 + x2 = 0 + 625

Reorder the terms:
-625 + 625 + -25x + x2 = 0 + 625

Combine like terms: -625 + 625 = 0
0 + -25x + x2 = 0 + 625
-25x + x2 = 0 + 625

Combine like terms: 0 + 625 = 625
-25x + x2 = 625

The x term is -25x.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25x + 156.25 + x2 = 625 + 156.25

Reorder the terms:
156.25 + -25x + x2 = 625 + 156.25

Combine like terms: 625 + 156.25 = 781.25
156.25 + -25x + x2 = 781.25

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 781.25

Calculate the square root of the right side: 27.950849719

Break this problem into two subproblems by setting 
(x + -12.5) equal to 27.950849719 and -27.950849719.

Subproblem 1

x + -12.5 = 27.950849719 Simplifying x + -12.5 = 27.950849719 Reorder the terms: -12.5 + x = 27.950849719 Solving -12.5 + x = 27.950849719 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = 27.950849719 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 27.950849719 + 12.5 x = 27.950849719 + 12.5 Combine like terms: 27.950849719 + 12.5 = 40.450849719 x = 40.450849719 Simplifying x = 40.450849719

Subproblem 2

x + -12.5 = -27.950849719 Simplifying x + -12.5 = -27.950849719 Reorder the terms: -12.5 + x = -27.950849719 Solving -12.5 + x = -27.950849719 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x = -27.950849719 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -27.950849719 + 12.5 x = -27.950849719 + 12.5 Combine like terms: -27.950849719 + 12.5 = -15.450849719 x = -15.450849719 Simplifying x = -15.450849719

Solution

The solution to the problem is based on the solutions from the subproblems. x = {40.450849719, -15.450849719}

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