x^2-7x-109=0

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Solution for x^2-7x-109=0 equation:


Simplifying
x2 + -7x + -109 = 0

Reorder the terms:
-109 + -7x + x2 = 0

Solving
-109 + -7x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '109' to each side of the equation.
-109 + -7x + 109 + x2 = 0 + 109

Reorder the terms:
-109 + 109 + -7x + x2 = 0 + 109

Combine like terms: -109 + 109 = 0
0 + -7x + x2 = 0 + 109
-7x + x2 = 0 + 109

Combine like terms: 0 + 109 = 109
-7x + x2 = 109

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 109 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 109 + 12.25

Combine like terms: 109 + 12.25 = 121.25
12.25 + -7x + x2 = 121.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 121.25

Calculate the square root of the right side: 11.011357773

Break this problem into two subproblems by setting 
(x + -3.5) equal to 11.011357773 and -11.011357773.

Subproblem 1

x + -3.5 = 11.011357773 Simplifying x + -3.5 = 11.011357773 Reorder the terms: -3.5 + x = 11.011357773 Solving -3.5 + x = 11.011357773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 11.011357773 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 11.011357773 + 3.5 x = 11.011357773 + 3.5 Combine like terms: 11.011357773 + 3.5 = 14.511357773 x = 14.511357773 Simplifying x = 14.511357773

Subproblem 2

x + -3.5 = -11.011357773 Simplifying x + -3.5 = -11.011357773 Reorder the terms: -3.5 + x = -11.011357773 Solving -3.5 + x = -11.011357773 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -11.011357773 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -11.011357773 + 3.5 x = -11.011357773 + 3.5 Combine like terms: -11.011357773 + 3.5 = -7.511357773 x = -7.511357773 Simplifying x = -7.511357773

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.511357773, -7.511357773}

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