25x^2-12x-1=0

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Solution for 25x^2-12x-1=0 equation:


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

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

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

Solving for variable 'x'.

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

Divide each side by '25'.
-0.04 + -0.48x + x2 = 0

Move the constant term to the right:

Add '0.04' to each side of the equation.
-0.04 + -0.48x + 0.04 + x2 = 0 + 0.04

Reorder the terms:
-0.04 + 0.04 + -0.48x + x2 = 0 + 0.04

Combine like terms: -0.04 + 0.04 = 0.00
0.00 + -0.48x + x2 = 0 + 0.04
-0.48x + x2 = 0 + 0.04

Combine like terms: 0 + 0.04 = 0.04
-0.48x + x2 = 0.04

The x term is -0.48x.  Take half its coefficient (-0.24).
Square it (0.0576) and add it to both sides.

Add '0.0576' to each side of the equation.
-0.48x + 0.0576 + x2 = 0.04 + 0.0576

Reorder the terms:
0.0576 + -0.48x + x2 = 0.04 + 0.0576

Combine like terms: 0.04 + 0.0576 = 0.0976
0.0576 + -0.48x + x2 = 0.0976

Factor a perfect square on the left side:
(x + -0.24)(x + -0.24) = 0.0976

Calculate the square root of the right side: 0.312409987

Break this problem into two subproblems by setting 
(x + -0.24) equal to 0.312409987 and -0.312409987.

Subproblem 1

x + -0.24 = 0.312409987 Simplifying x + -0.24 = 0.312409987 Reorder the terms: -0.24 + x = 0.312409987 Solving -0.24 + x = 0.312409987 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.24' to each side of the equation. -0.24 + 0.24 + x = 0.312409987 + 0.24 Combine like terms: -0.24 + 0.24 = 0.00 0.00 + x = 0.312409987 + 0.24 x = 0.312409987 + 0.24 Combine like terms: 0.312409987 + 0.24 = 0.552409987 x = 0.552409987 Simplifying x = 0.552409987

Subproblem 2

x + -0.24 = -0.312409987 Simplifying x + -0.24 = -0.312409987 Reorder the terms: -0.24 + x = -0.312409987 Solving -0.24 + x = -0.312409987 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.24' to each side of the equation. -0.24 + 0.24 + x = -0.312409987 + 0.24 Combine like terms: -0.24 + 0.24 = 0.00 0.00 + x = -0.312409987 + 0.24 x = -0.312409987 + 0.24 Combine like terms: -0.312409987 + 0.24 = -0.072409987 x = -0.072409987 Simplifying x = -0.072409987

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.552409987, -0.072409987}

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