x^2+6x-26=9

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Solution for x^2+6x-26=9 equation:


Simplifying
x2 + 6x + -26 = 9

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

Solving
-26 + 6x + x2 = 9

Solving for variable 'x'.

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

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

Combine like terms: 9 + -9 = 0
-35 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + 6x + 35 + x2 = 0 + 35

Reorder the terms:
-35 + 35 + 6x + x2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + 6x + x2 = 0 + 35
6x + x2 = 0 + 35

Combine like terms: 0 + 35 = 35
6x + x2 = 35

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 = 35 + 9

Reorder the terms:
9 + 6x + x2 = 35 + 9

Combine like terms: 35 + 9 = 44
9 + 6x + x2 = 44

Factor a perfect square on the left side:
(x + 3)(x + 3) = 44

Calculate the square root of the right side: 6.633249581

Break this problem into two subproblems by setting 
(x + 3) equal to 6.633249581 and -6.633249581.

Subproblem 1

x + 3 = 6.633249581 Simplifying x + 3 = 6.633249581 Reorder the terms: 3 + x = 6.633249581 Solving 3 + x = 6.633249581 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 = 6.633249581 + -3 Combine like terms: 3 + -3 = 0 0 + x = 6.633249581 + -3 x = 6.633249581 + -3 Combine like terms: 6.633249581 + -3 = 3.633249581 x = 3.633249581 Simplifying x = 3.633249581

Subproblem 2

x + 3 = -6.633249581 Simplifying x + 3 = -6.633249581 Reorder the terms: 3 + x = -6.633249581 Solving 3 + x = -6.633249581 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 = -6.633249581 + -3 Combine like terms: 3 + -3 = 0 0 + x = -6.633249581 + -3 x = -6.633249581 + -3 Combine like terms: -6.633249581 + -3 = -9.633249581 x = -9.633249581 Simplifying x = -9.633249581

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.633249581, -9.633249581}

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