x^2-11x-69=0

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Solution for x^2-11x-69=0 equation:


Simplifying
x2 + -11x + -69 = 0

Reorder the terms:
-69 + -11x + x2 = 0

Solving
-69 + -11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '69' to each side of the equation.
-69 + -11x + 69 + x2 = 0 + 69

Reorder the terms:
-69 + 69 + -11x + x2 = 0 + 69

Combine like terms: -69 + 69 = 0
0 + -11x + x2 = 0 + 69
-11x + x2 = 0 + 69

Combine like terms: 0 + 69 = 69
-11x + x2 = 69

The x term is -11x.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x + 30.25 + x2 = 69 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 69 + 30.25

Combine like terms: 69 + 30.25 = 99.25
30.25 + -11x + x2 = 99.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 99.25

Calculate the square root of the right side: 9.962429423

Break this problem into two subproblems by setting 
(x + -5.5) equal to 9.962429423 and -9.962429423.

Subproblem 1

x + -5.5 = 9.962429423 Simplifying x + -5.5 = 9.962429423 Reorder the terms: -5.5 + x = 9.962429423 Solving -5.5 + x = 9.962429423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = 9.962429423 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 9.962429423 + 5.5 x = 9.962429423 + 5.5 Combine like terms: 9.962429423 + 5.5 = 15.462429423 x = 15.462429423 Simplifying x = 15.462429423

Subproblem 2

x + -5.5 = -9.962429423 Simplifying x + -5.5 = -9.962429423 Reorder the terms: -5.5 + x = -9.962429423 Solving -5.5 + x = -9.962429423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x = -9.962429423 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -9.962429423 + 5.5 x = -9.962429423 + 5.5 Combine like terms: -9.962429423 + 5.5 = -4.462429423 x = -4.462429423 Simplifying x = -4.462429423

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.462429423, -4.462429423}

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