5x^2-26x-25=0

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Solution for 5x^2-26x-25=0 equation:


Simplifying
5x2 + -26x + -25 = 0

Reorder the terms:
-25 + -26x + 5x2 = 0

Solving
-25 + -26x + 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'.
-5 + -5.2x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -5.2x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -5.2x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -5.2x + x2 = 0 + 5
-5.2x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-5.2x + x2 = 5

The x term is -5.2x.  Take half its coefficient (-2.6).
Square it (6.76) and add it to both sides.

Add '6.76' to each side of the equation.
-5.2x + 6.76 + x2 = 5 + 6.76

Reorder the terms:
6.76 + -5.2x + x2 = 5 + 6.76

Combine like terms: 5 + 6.76 = 11.76
6.76 + -5.2x + x2 = 11.76

Factor a perfect square on the left side:
(x + -2.6)(x + -2.6) = 11.76

Calculate the square root of the right side: 3.42928564

Break this problem into two subproblems by setting 
(x + -2.6) equal to 3.42928564 and -3.42928564.

Subproblem 1

x + -2.6 = 3.42928564 Simplifying x + -2.6 = 3.42928564 Reorder the terms: -2.6 + x = 3.42928564 Solving -2.6 + x = 3.42928564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.6' to each side of the equation. -2.6 + 2.6 + x = 3.42928564 + 2.6 Combine like terms: -2.6 + 2.6 = 0.0 0.0 + x = 3.42928564 + 2.6 x = 3.42928564 + 2.6 Combine like terms: 3.42928564 + 2.6 = 6.02928564 x = 6.02928564 Simplifying x = 6.02928564

Subproblem 2

x + -2.6 = -3.42928564 Simplifying x + -2.6 = -3.42928564 Reorder the terms: -2.6 + x = -3.42928564 Solving -2.6 + x = -3.42928564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.6' to each side of the equation. -2.6 + 2.6 + x = -3.42928564 + 2.6 Combine like terms: -2.6 + 2.6 = 0.0 0.0 + x = -3.42928564 + 2.6 x = -3.42928564 + 2.6 Combine like terms: -3.42928564 + 2.6 = -0.82928564 x = -0.82928564 Simplifying x = -0.82928564

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.02928564, -0.82928564}

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