26x^2-63x-4=0

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Solution for 26x^2-63x-4=0 equation:


Simplifying
26x2 + -63x + -4 = 0

Reorder the terms:
-4 + -63x + 26x2 = 0

Solving
-4 + -63x + 26x2 = 0

Solving for variable 'x'.

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

Divide each side by '26'.
-0.1538461538 + -2.423076923x + x2 = 0

Move the constant term to the right:

Add '0.1538461538' to each side of the equation.
-0.1538461538 + -2.423076923x + 0.1538461538 + x2 = 0 + 0.1538461538

Reorder the terms:
-0.1538461538 + 0.1538461538 + -2.423076923x + x2 = 0 + 0.1538461538

Combine like terms: -0.1538461538 + 0.1538461538 = 0.0000000000
0.0000000000 + -2.423076923x + x2 = 0 + 0.1538461538
-2.423076923x + x2 = 0 + 0.1538461538

Combine like terms: 0 + 0.1538461538 = 0.1538461538
-2.423076923x + x2 = 0.1538461538

The x term is -2.423076923x.  Take half its coefficient (-1.211538462).
Square it (1.467825445) and add it to both sides.

Add '1.467825445' to each side of the equation.
-2.423076923x + 1.467825445 + x2 = 0.1538461538 + 1.467825445

Reorder the terms:
1.467825445 + -2.423076923x + x2 = 0.1538461538 + 1.467825445

Combine like terms: 0.1538461538 + 1.467825445 = 1.6216715988
1.467825445 + -2.423076923x + x2 = 1.6216715988

Factor a perfect square on the left side:
(x + -1.211538462)(x + -1.211538462) = 1.6216715988

Calculate the square root of the right side: 1.273448703

Break this problem into two subproblems by setting 
(x + -1.211538462) equal to 1.273448703 and -1.273448703.

Subproblem 1

x + -1.211538462 = 1.273448703 Simplifying x + -1.211538462 = 1.273448703 Reorder the terms: -1.211538462 + x = 1.273448703 Solving -1.211538462 + x = 1.273448703 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.211538462' to each side of the equation. -1.211538462 + 1.211538462 + x = 1.273448703 + 1.211538462 Combine like terms: -1.211538462 + 1.211538462 = 0.000000000 0.000000000 + x = 1.273448703 + 1.211538462 x = 1.273448703 + 1.211538462 Combine like terms: 1.273448703 + 1.211538462 = 2.484987165 x = 2.484987165 Simplifying x = 2.484987165

Subproblem 2

x + -1.211538462 = -1.273448703 Simplifying x + -1.211538462 = -1.273448703 Reorder the terms: -1.211538462 + x = -1.273448703 Solving -1.211538462 + x = -1.273448703 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.211538462' to each side of the equation. -1.211538462 + 1.211538462 + x = -1.273448703 + 1.211538462 Combine like terms: -1.211538462 + 1.211538462 = 0.000000000 0.000000000 + x = -1.273448703 + 1.211538462 x = -1.273448703 + 1.211538462 Combine like terms: -1.273448703 + 1.211538462 = -0.061910241 x = -0.061910241 Simplifying x = -0.061910241

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.484987165, -0.061910241}

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