37-11x=81-x^2

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Solution for 37-11x=81-x^2 equation:


Simplifying
37 + -11x = 81 + -1x2

Solving
37 + -11x = 81 + -1x2

Solving for variable 'x'.

Reorder the terms:
37 + -81 + -11x + x2 = 81 + -1x2 + -81 + x2

Combine like terms: 37 + -81 = -44
-44 + -11x + x2 = 81 + -1x2 + -81 + x2

Reorder the terms:
-44 + -11x + x2 = 81 + -81 + -1x2 + x2

Combine like terms: 81 + -81 = 0
-44 + -11x + x2 = 0 + -1x2 + x2
-44 + -11x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-44 + -11x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '44' to each side of the equation.
-44 + -11x + 44 + x2 = 0 + 44

Reorder the terms:
-44 + 44 + -11x + x2 = 0 + 44

Combine like terms: -44 + 44 = 0
0 + -11x + x2 = 0 + 44
-11x + x2 = 0 + 44

Combine like terms: 0 + 44 = 44
-11x + x2 = 44

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 = 44 + 30.25

Reorder the terms:
30.25 + -11x + x2 = 44 + 30.25

Combine like terms: 44 + 30.25 = 74.25
30.25 + -11x + x2 = 74.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 74.25

Calculate the square root of the right side: 8.61684397

Break this problem into two subproblems by setting 
(x + -5.5) equal to 8.61684397 and -8.61684397.

Subproblem 1

x + -5.5 = 8.61684397 Simplifying x + -5.5 = 8.61684397 Reorder the terms: -5.5 + x = 8.61684397 Solving -5.5 + x = 8.61684397 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 = 8.61684397 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 8.61684397 + 5.5 x = 8.61684397 + 5.5 Combine like terms: 8.61684397 + 5.5 = 14.11684397 x = 14.11684397 Simplifying x = 14.11684397

Subproblem 2

x + -5.5 = -8.61684397 Simplifying x + -5.5 = -8.61684397 Reorder the terms: -5.5 + x = -8.61684397 Solving -5.5 + x = -8.61684397 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 = -8.61684397 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -8.61684397 + 5.5 x = -8.61684397 + 5.5 Combine like terms: -8.61684397 + 5.5 = -3.11684397 x = -3.11684397 Simplifying x = -3.11684397

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.11684397, -3.11684397}

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