5x^2-6x-26=0

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Solution for 5x^2-6x-26=0 equation:


Simplifying
5x2 + -6x + -26 = 0

Reorder the terms:
-26 + -6x + 5x2 = 0

Solving
-26 + -6x + 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'.
-5.2 + -1.2x + x2 = 0

Move the constant term to the right:

Add '5.2' to each side of the equation.
-5.2 + -1.2x + 5.2 + x2 = 0 + 5.2

Reorder the terms:
-5.2 + 5.2 + -1.2x + x2 = 0 + 5.2

Combine like terms: -5.2 + 5.2 = 0.0
0.0 + -1.2x + x2 = 0 + 5.2
-1.2x + x2 = 0 + 5.2

Combine like terms: 0 + 5.2 = 5.2
-1.2x + x2 = 5.2

The x term is -1.2x.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2x + 0.36 + x2 = 5.2 + 0.36

Reorder the terms:
0.36 + -1.2x + x2 = 5.2 + 0.36

Combine like terms: 5.2 + 0.36 = 5.56
0.36 + -1.2x + x2 = 5.56

Factor a perfect square on the left side:
(x + -0.6)(x + -0.6) = 5.56

Calculate the square root of the right side: 2.357965225

Break this problem into two subproblems by setting 
(x + -0.6) equal to 2.357965225 and -2.357965225.

Subproblem 1

x + -0.6 = 2.357965225 Simplifying x + -0.6 = 2.357965225 Reorder the terms: -0.6 + x = 2.357965225 Solving -0.6 + x = 2.357965225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = 2.357965225 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = 2.357965225 + 0.6 x = 2.357965225 + 0.6 Combine like terms: 2.357965225 + 0.6 = 2.957965225 x = 2.957965225 Simplifying x = 2.957965225

Subproblem 2

x + -0.6 = -2.357965225 Simplifying x + -0.6 = -2.357965225 Reorder the terms: -0.6 + x = -2.357965225 Solving -0.6 + x = -2.357965225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = -2.357965225 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = -2.357965225 + 0.6 x = -2.357965225 + 0.6 Combine like terms: -2.357965225 + 0.6 = -1.757965225 x = -1.757965225 Simplifying x = -1.757965225

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.957965225, -1.757965225}

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