x^2-11x-14=0

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Solution for x^2-11x-14=0 equation:


Simplifying
x2 + -11x + -14 = 0

Reorder the terms:
-14 + -11x + x2 = 0

Solving
-14 + -11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -11x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + -11x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -11x + x2 = 0 + 14
-11x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
-11x + x2 = 14

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 = 14 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 14 + 30.25

Combine like terms: 14 + 30.25 = 44.25
30.25 + -11x + x2 = 44.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 44.25

Calculate the square root of the right side: 6.652067348

Break this problem into two subproblems by setting 
(x + -5.5) equal to 6.652067348 and -6.652067348.

Subproblem 1

x + -5.5 = 6.652067348 Simplifying x + -5.5 = 6.652067348 Reorder the terms: -5.5 + x = 6.652067348 Solving -5.5 + x = 6.652067348 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 = 6.652067348 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 6.652067348 + 5.5 x = 6.652067348 + 5.5 Combine like terms: 6.652067348 + 5.5 = 12.152067348 x = 12.152067348 Simplifying x = 12.152067348

Subproblem 2

x + -5.5 = -6.652067348 Simplifying x + -5.5 = -6.652067348 Reorder the terms: -5.5 + x = -6.652067348 Solving -5.5 + x = -6.652067348 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 = -6.652067348 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -6.652067348 + 5.5 x = -6.652067348 + 5.5 Combine like terms: -6.652067348 + 5.5 = -1.152067348 x = -1.152067348 Simplifying x = -1.152067348

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.152067348, -1.152067348}

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