7x-11y-23=x(x+3)-11(y+x)

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Solution for 7x-11y-23=x(x+3)-11(y+x) equation:


Simplifying
7x + -11y + -23 = x(x + 3) + -11(y + x)

Reorder the terms:
-23 + 7x + -11y = x(x + 3) + -11(y + x)

Reorder the terms:
-23 + 7x + -11y = x(3 + x) + -11(y + x)
-23 + 7x + -11y = (3 * x + x * x) + -11(y + x)
-23 + 7x + -11y = (3x + x2) + -11(y + x)

Reorder the terms:
-23 + 7x + -11y = 3x + x2 + -11(x + y)
-23 + 7x + -11y = 3x + x2 + (x * -11 + y * -11)
-23 + 7x + -11y = 3x + x2 + (-11x + -11y)

Reorder the terms:
-23 + 7x + -11y = 3x + -11x + x2 + -11y

Combine like terms: 3x + -11x = -8x
-23 + 7x + -11y = -8x + x2 + -11y

Add '11y' to each side of the equation.
-23 + 7x + -11y + 11y = -8x + x2 + -11y + 11y

Combine like terms: -11y + 11y = 0
-23 + 7x + 0 = -8x + x2 + -11y + 11y
-23 + 7x = -8x + x2 + -11y + 11y

Combine like terms: -11y + 11y = 0
-23 + 7x = -8x + x2 + 0
-23 + 7x = -8x + x2

Solving
-23 + 7x = -8x + x2

Solving for variable 'x'.

Combine like terms: 7x + 8x = 15x
-23 + 15x + -1x2 = -8x + x2 + 8x + -1x2

Reorder the terms:
-23 + 15x + -1x2 = -8x + 8x + x2 + -1x2

Combine like terms: -8x + 8x = 0
-23 + 15x + -1x2 = 0 + x2 + -1x2
-23 + 15x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-23 + 15x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
23 + -15x + x2 = 0

Move the constant term to the right:

Add '-23' to each side of the equation.
23 + -15x + -23 + x2 = 0 + -23

Reorder the terms:
23 + -23 + -15x + x2 = 0 + -23

Combine like terms: 23 + -23 = 0
0 + -15x + x2 = 0 + -23
-15x + x2 = 0 + -23

Combine like terms: 0 + -23 = -23
-15x + x2 = -23

The x term is -15x.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15x + 56.25 + x2 = -23 + 56.25

Reorder the terms:
56.25 + -15x + x2 = -23 + 56.25

Combine like terms: -23 + 56.25 = 33.25
56.25 + -15x + x2 = 33.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 33.25

Calculate the square root of the right side: 5.766281297

Break this problem into two subproblems by setting 
(x + -7.5) equal to 5.766281297 and -5.766281297.

Subproblem 1

x + -7.5 = 5.766281297 Simplifying x + -7.5 = 5.766281297 Reorder the terms: -7.5 + x = 5.766281297 Solving -7.5 + x = 5.766281297 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = 5.766281297 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 5.766281297 + 7.5 x = 5.766281297 + 7.5 Combine like terms: 5.766281297 + 7.5 = 13.266281297 x = 13.266281297 Simplifying x = 13.266281297

Subproblem 2

x + -7.5 = -5.766281297 Simplifying x + -7.5 = -5.766281297 Reorder the terms: -7.5 + x = -5.766281297 Solving -7.5 + x = -5.766281297 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = -5.766281297 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -5.766281297 + 7.5 x = -5.766281297 + 7.5 Combine like terms: -5.766281297 + 7.5 = 1.733718703 x = 1.733718703 Simplifying x = 1.733718703

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.266281297, 1.733718703}

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