5x^2+5x-26=0

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


Simplifying
5x2 + 5x + -26 = 0

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

Solving
-26 + 5x + 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 + x + x2 = 0

Move the constant term to the right:

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

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

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

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

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = 5.2 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 5.2 + 0.25

Combine like terms: 5.2 + 0.25 = 5.45
1.25 + x2 = 5.45

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 5.45

Calculate the square root of the right side: 2.334523506

Break this problem into two subproblems by setting 
(x + 0.5) equal to 2.334523506 and -2.334523506.

Subproblem 1

x + 0.5 = 2.334523506 Simplifying x + 0.5 = 2.334523506 Reorder the terms: 0.5 + x = 2.334523506 Solving 0.5 + x = 2.334523506 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 2.334523506 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.334523506 + -0.5 x = 2.334523506 + -0.5 Combine like terms: 2.334523506 + -0.5 = 1.834523506 x = 1.834523506 Simplifying x = 1.834523506

Subproblem 2

x + 0.5 = -2.334523506 Simplifying x + 0.5 = -2.334523506 Reorder the terms: 0.5 + x = -2.334523506 Solving 0.5 + x = -2.334523506 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -2.334523506 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.334523506 + -0.5 x = -2.334523506 + -0.5 Combine like terms: -2.334523506 + -0.5 = -2.834523506 x = -2.834523506 Simplifying x = -2.834523506

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.834523506, -2.834523506}

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