12.4x^2-500x+5000=0

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Solution for 12.4x^2-500x+5000=0 equation:


Simplifying
12.4x2 + -500x + 5000 = 0

Reorder the terms:
5000 + -500x + 12.4x2 = 0

Solving
5000 + -500x + 12.4x2 = 0

Solving for variable 'x'.

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

Divide each side by '12.4'.
403.2258065 + -40.32258065x + x2 = 0

Move the constant term to the right:

Add '-403.2258065' to each side of the equation.
403.2258065 + -40.32258065x + -403.2258065 + x2 = 0 + -403.2258065

Reorder the terms:
403.2258065 + -403.2258065 + -40.32258065x + x2 = 0 + -403.2258065

Combine like terms: 403.2258065 + -403.2258065 = 0.0000000
0.0000000 + -40.32258065x + x2 = 0 + -403.2258065
-40.32258065x + x2 = 0 + -403.2258065

Combine like terms: 0 + -403.2258065 = -403.2258065
-40.32258065x + x2 = -403.2258065

The x term is -40.32258065x.  Take half its coefficient (-20.16129033).
Square it (406.4776278) and add it to both sides.

Add '406.4776278' to each side of the equation.
-40.32258065x + 406.4776278 + x2 = -403.2258065 + 406.4776278

Reorder the terms:
406.4776278 + -40.32258065x + x2 = -403.2258065 + 406.4776278

Combine like terms: -403.2258065 + 406.4776278 = 3.2518213
406.4776278 + -40.32258065x + x2 = 3.2518213

Factor a perfect square on the left side:
(x + -20.16129033)(x + -20.16129033) = 3.2518213

Calculate the square root of the right side: 1.803280705

Break this problem into two subproblems by setting 
(x + -20.16129033) equal to 1.803280705 and -1.803280705.

Subproblem 1

x + -20.16129033 = 1.803280705 Simplifying x + -20.16129033 = 1.803280705 Reorder the terms: -20.16129033 + x = 1.803280705 Solving -20.16129033 + x = 1.803280705 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20.16129033' to each side of the equation. -20.16129033 + 20.16129033 + x = 1.803280705 + 20.16129033 Combine like terms: -20.16129033 + 20.16129033 = 0.00000000 0.00000000 + x = 1.803280705 + 20.16129033 x = 1.803280705 + 20.16129033 Combine like terms: 1.803280705 + 20.16129033 = 21.964571035 x = 21.964571035 Simplifying x = 21.964571035

Subproblem 2

x + -20.16129033 = -1.803280705 Simplifying x + -20.16129033 = -1.803280705 Reorder the terms: -20.16129033 + x = -1.803280705 Solving -20.16129033 + x = -1.803280705 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20.16129033' to each side of the equation. -20.16129033 + 20.16129033 + x = -1.803280705 + 20.16129033 Combine like terms: -20.16129033 + 20.16129033 = 0.00000000 0.00000000 + x = -1.803280705 + 20.16129033 x = -1.803280705 + 20.16129033 Combine like terms: -1.803280705 + 20.16129033 = 18.358009625 x = 18.358009625 Simplifying x = 18.358009625

Solution

The solution to the problem is based on the solutions from the subproblems. x = {21.964571035, 18.358009625}

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