-x^2+25x-12=0

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


Simplifying
-1x2 + 25x + -12 = 0

Reorder the terms:
-12 + 25x + -1x2 = 0

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

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -25x + -12 + x2 = 0 + -12

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

Combine like terms: 12 + -12 = 0
0 + -25x + x2 = 0 + -12
-25x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
-25x + x2 = -12

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 = -12 + 156.25

Reorder the terms:
156.25 + -25x + x2 = -12 + 156.25

Combine like terms: -12 + 156.25 = 144.25
156.25 + -25x + x2 = 144.25

Factor a perfect square on the left side:
(x + -12.5)(x + -12.5) = 144.25

Calculate the square root of the right side: 12.010412149

Break this problem into two subproblems by setting 
(x + -12.5) equal to 12.010412149 and -12.010412149.

Subproblem 1

x + -12.5 = 12.010412149 Simplifying x + -12.5 = 12.010412149 Reorder the terms: -12.5 + x = 12.010412149 Solving -12.5 + x = 12.010412149 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 = 12.010412149 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = 12.010412149 + 12.5 x = 12.010412149 + 12.5 Combine like terms: 12.010412149 + 12.5 = 24.510412149 x = 24.510412149 Simplifying x = 24.510412149

Subproblem 2

x + -12.5 = -12.010412149 Simplifying x + -12.5 = -12.010412149 Reorder the terms: -12.5 + x = -12.010412149 Solving -12.5 + x = -12.010412149 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 = -12.010412149 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x = -12.010412149 + 12.5 x = -12.010412149 + 12.5 Combine like terms: -12.010412149 + 12.5 = 0.489587851 x = 0.489587851 Simplifying x = 0.489587851

Solution

The solution to the problem is based on the solutions from the subproblems. x = {24.510412149, 0.489587851}

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