x^2=11x+55

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Solution for x^2=11x+55 equation:


Simplifying
x2 = 11x + 55

Reorder the terms:
x2 = 55 + 11x

Solving
x2 = 55 + 11x

Solving for variable 'x'.

Reorder the terms:
-55 + -11x + x2 = 55 + 11x + -55 + -11x

Reorder the terms:
-55 + -11x + x2 = 55 + -55 + 11x + -11x

Combine like terms: 55 + -55 = 0
-55 + -11x + x2 = 0 + 11x + -11x
-55 + -11x + x2 = 11x + -11x

Combine like terms: 11x + -11x = 0
-55 + -11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '55' to each side of the equation.
-55 + -11x + 55 + x2 = 0 + 55

Reorder the terms:
-55 + 55 + -11x + x2 = 0 + 55

Combine like terms: -55 + 55 = 0
0 + -11x + x2 = 0 + 55
-11x + x2 = 0 + 55

Combine like terms: 0 + 55 = 55
-11x + x2 = 55

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 = 55 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 55 + 30.25

Combine like terms: 55 + 30.25 = 85.25
30.25 + -11x + x2 = 85.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 85.25

Calculate the square root of the right side: 9.233092656

Break this problem into two subproblems by setting 
(x + -5.5) equal to 9.233092656 and -9.233092656.

Subproblem 1

x + -5.5 = 9.233092656 Simplifying x + -5.5 = 9.233092656 Reorder the terms: -5.5 + x = 9.233092656 Solving -5.5 + x = 9.233092656 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 = 9.233092656 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 9.233092656 + 5.5 x = 9.233092656 + 5.5 Combine like terms: 9.233092656 + 5.5 = 14.733092656 x = 14.733092656 Simplifying x = 14.733092656

Subproblem 2

x + -5.5 = -9.233092656 Simplifying x + -5.5 = -9.233092656 Reorder the terms: -5.5 + x = -9.233092656 Solving -5.5 + x = -9.233092656 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 = -9.233092656 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -9.233092656 + 5.5 x = -9.233092656 + 5.5 Combine like terms: -9.233092656 + 5.5 = -3.733092656 x = -3.733092656 Simplifying x = -3.733092656

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.733092656, -3.733092656}

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