x^2+6x-26=0

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


Simplifying
x2 + 6x + -26 = 0

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

Solving
-26 + 6x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '26' to each side of the equation.
-26 + 6x + 26 + x2 = 0 + 26

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

Combine like terms: -26 + 26 = 0
0 + 6x + x2 = 0 + 26
6x + x2 = 0 + 26

Combine like terms: 0 + 26 = 26
6x + x2 = 26

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 26 + 9

Reorder the terms:
9 + 6x + x2 = 26 + 9

Combine like terms: 26 + 9 = 35
9 + 6x + x2 = 35

Factor a perfect square on the left side:
(x + 3)(x + 3) = 35

Calculate the square root of the right side: 5.916079783

Break this problem into two subproblems by setting 
(x + 3) equal to 5.916079783 and -5.916079783.

Subproblem 1

x + 3 = 5.916079783 Simplifying x + 3 = 5.916079783 Reorder the terms: 3 + x = 5.916079783 Solving 3 + x = 5.916079783 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 5.916079783 + -3 Combine like terms: 3 + -3 = 0 0 + x = 5.916079783 + -3 x = 5.916079783 + -3 Combine like terms: 5.916079783 + -3 = 2.916079783 x = 2.916079783 Simplifying x = 2.916079783

Subproblem 2

x + 3 = -5.916079783 Simplifying x + 3 = -5.916079783 Reorder the terms: 3 + x = -5.916079783 Solving 3 + x = -5.916079783 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -5.916079783 + -3 Combine like terms: 3 + -3 = 0 0 + x = -5.916079783 + -3 x = -5.916079783 + -3 Combine like terms: -5.916079783 + -3 = -8.916079783 x = -8.916079783 Simplifying x = -8.916079783

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.916079783, -8.916079783}

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