5x^2-25x+12=0

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Solution for 5x^2-25x+12=0 equation:


Simplifying
5x2 + -25x + 12 = 0

Reorder the terms:
12 + -25x + 5x2 = 0

Solving
12 + -25x + 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'.
2.4 + -5x + x2 = 0

Move the constant term to the right:

Add '-2.4' to each side of the equation.
2.4 + -5x + -2.4 + x2 = 0 + -2.4

Reorder the terms:
2.4 + -2.4 + -5x + x2 = 0 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + -5x + x2 = 0 + -2.4
-5x + x2 = 0 + -2.4

Combine like terms: 0 + -2.4 = -2.4
-5x + x2 = -2.4

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 = -2.4 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -2.4 + 6.25

Combine like terms: -2.4 + 6.25 = 3.85
6.25 + -5x + x2 = 3.85

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 3.85

Calculate the square root of the right side: 1.962141687

Break this problem into two subproblems by setting 
(x + -2.5) equal to 1.962141687 and -1.962141687.

Subproblem 1

x + -2.5 = 1.962141687 Simplifying x + -2.5 = 1.962141687 Reorder the terms: -2.5 + x = 1.962141687 Solving -2.5 + x = 1.962141687 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 = 1.962141687 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 1.962141687 + 2.5 x = 1.962141687 + 2.5 Combine like terms: 1.962141687 + 2.5 = 4.462141687 x = 4.462141687 Simplifying x = 4.462141687

Subproblem 2

x + -2.5 = -1.962141687 Simplifying x + -2.5 = -1.962141687 Reorder the terms: -2.5 + x = -1.962141687 Solving -2.5 + x = -1.962141687 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 = -1.962141687 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -1.962141687 + 2.5 x = -1.962141687 + 2.5 Combine like terms: -1.962141687 + 2.5 = 0.537858313 x = 0.537858313 Simplifying x = 0.537858313

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.462141687, 0.537858313}

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