5x^2-125x+312.5=0

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Solution for 5x^2-125x+312.5=0 equation:


Simplifying
5x2 + -125x + 312.5 = 0

Reorder the terms:
312.5 + -125x + 5x2 = 0

Solving
312.5 + -125x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
62.5 + -25x + x2 = 0

Move the constant term to the right:

Add '-62.5' to each side of the equation.
62.5 + -25x + -62.5 + x2 = 0 + -62.5

Reorder the terms:
62.5 + -62.5 + -25x + x2 = 0 + -62.5

Combine like terms: 62.5 + -62.5 = 0.0
0.0 + -25x + x2 = 0 + -62.5
-25x + x2 = 0 + -62.5

Combine like terms: 0 + -62.5 = -62.5
-25x + x2 = -62.5

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 = -62.5 + 156.25

Reorder the terms:
156.25 + -25x + x2 = -62.5 + 156.25

Combine like terms: -62.5 + 156.25 = 93.75
156.25 + -25x + x2 = 93.75

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 93.75

Calculate the square root of the right side: 9.682458366

Break this problem into two subproblems by setting 
(x + -12.5) equal to 9.682458366 and -9.682458366.

Subproblem 1

x + -12.5 = 9.682458366 Simplifying x + -12.5 = 9.682458366 Reorder the terms: -12.5 + x = 9.682458366 Solving -12.5 + x = 9.682458366 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 = 9.682458366 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 9.682458366 + 12.5 x = 9.682458366 + 12.5 Combine like terms: 9.682458366 + 12.5 = 22.182458366 x = 22.182458366 Simplifying x = 22.182458366

Subproblem 2

x + -12.5 = -9.682458366 Simplifying x + -12.5 = -9.682458366 Reorder the terms: -12.5 + x = -9.682458366 Solving -12.5 + x = -9.682458366 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 = -9.682458366 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -9.682458366 + 12.5 x = -9.682458366 + 12.5 Combine like terms: -9.682458366 + 12.5 = 2.817541634 x = 2.817541634 Simplifying x = 2.817541634

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.182458366, 2.817541634}

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