5x^2=25x-12.6

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Solution for 5x^2=25x-12.6 equation:


Simplifying
5x2 = 25x + -12.6

Reorder the terms:
5x2 = -12.6 + 25x

Solving
5x2 = -12.6 + 25x

Solving for variable 'x'.

Reorder the terms:
12.6 + -25x + 5x2 = -12.6 + 25x + 12.6 + -25x

Reorder the terms:
12.6 + -25x + 5x2 = -12.6 + 12.6 + 25x + -25x

Combine like terms: -12.6 + 12.6 = 0.0
12.6 + -25x + 5x2 = 0.0 + 25x + -25x
12.6 + -25x + 5x2 = 25x + -25x

Combine like terms: 25x + -25x = 0
12.6 + -25x + 5x2 = 0

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

Divide each side by '5'.
2.52 + -5x + x2 = 0

Move the constant term to the right:

Add '-2.52' to each side of the equation.
2.52 + -5x + -2.52 + x2 = 0 + -2.52

Reorder the terms:
2.52 + -2.52 + -5x + x2 = 0 + -2.52

Combine like terms: 2.52 + -2.52 = 0.00
0.00 + -5x + x2 = 0 + -2.52
-5x + x2 = 0 + -2.52

Combine like terms: 0 + -2.52 = -2.52
-5x + x2 = -2.52

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -2.52 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -2.52 + 6.25

Combine like terms: -2.52 + 6.25 = 3.73
6.25 + -5x + x2 = 3.73

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 3.73

Calculate the square root of the right side: 1.931320792

Break this problem into two subproblems by setting 
(x + -2.5) equal to 1.931320792 and -1.931320792.

Subproblem 1

x + -2.5 = 1.931320792 Simplifying x + -2.5 = 1.931320792 Reorder the terms: -2.5 + x = 1.931320792 Solving -2.5 + x = 1.931320792 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 1.931320792 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 1.931320792 + 2.5 x = 1.931320792 + 2.5 Combine like terms: 1.931320792 + 2.5 = 4.431320792 x = 4.431320792 Simplifying x = 4.431320792

Subproblem 2

x + -2.5 = -1.931320792 Simplifying x + -2.5 = -1.931320792 Reorder the terms: -2.5 + x = -1.931320792 Solving -2.5 + x = -1.931320792 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -1.931320792 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -1.931320792 + 2.5 x = -1.931320792 + 2.5 Combine like terms: -1.931320792 + 2.5 = 0.568679208 x = 0.568679208 Simplifying x = 0.568679208

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.431320792, 0.568679208}

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