226.6=(15+2x)*(11+2x)

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Solution for 226.6=(15+2x)*(11+2x) equation:


Simplifying
226.6 = (15 + 2x)(11 + 2x)

Multiply (15 + 2x) * (11 + 2x)
226.6 = (15(11 + 2x) + 2x * (11 + 2x))
226.6 = ((11 * 15 + 2x * 15) + 2x * (11 + 2x))
226.6 = ((165 + 30x) + 2x * (11 + 2x))
226.6 = (165 + 30x + (11 * 2x + 2x * 2x))
226.6 = (165 + 30x + (22x + 4x2))

Combine like terms: 30x + 22x = 52x
226.6 = (165 + 52x + 4x2)

Solving
226.6 = 165 + 52x + 4x2

Solving for variable 'x'.

Combine like terms: 226.6 + -165 = 61.6
61.6 + -52x + -4x2 = 165 + 52x + 4x2 + -165 + -52x + -4x2

Reorder the terms:
61.6 + -52x + -4x2 = 165 + -165 + 52x + -52x + 4x2 + -4x2

Combine like terms: 165 + -165 = 0
61.6 + -52x + -4x2 = 0 + 52x + -52x + 4x2 + -4x2
61.6 + -52x + -4x2 = 52x + -52x + 4x2 + -4x2

Combine like terms: 52x + -52x = 0
61.6 + -52x + -4x2 = 0 + 4x2 + -4x2
61.6 + -52x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
61.6 + -52x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-15.4 + 13x + x2 = 0

Move the constant term to the right:

Add '15.4' to each side of the equation.
-15.4 + 13x + 15.4 + x2 = 0 + 15.4

Reorder the terms:
-15.4 + 15.4 + 13x + x2 = 0 + 15.4

Combine like terms: -15.4 + 15.4 = 0.0
0.0 + 13x + x2 = 0 + 15.4
13x + x2 = 0 + 15.4

Combine like terms: 0 + 15.4 = 15.4
13x + x2 = 15.4

The x term is 13x.  Take half its coefficient (6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
13x + 42.25 + x2 = 15.4 + 42.25

Reorder the terms:
42.25 + 13x + x2 = 15.4 + 42.25

Combine like terms: 15.4 + 42.25 = 57.65
42.25 + 13x + x2 = 57.65

Factor a perfect square on the left side:
(x + 6.5)(x + 6.5) = 57.65

Calculate the square root of the right side: 7.592759709

Break this problem into two subproblems by setting 
(x + 6.5) equal to 7.592759709 and -7.592759709.

Subproblem 1

x + 6.5 = 7.592759709 Simplifying x + 6.5 = 7.592759709 Reorder the terms: 6.5 + x = 7.592759709 Solving 6.5 + x = 7.592759709 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.5' to each side of the equation. 6.5 + -6.5 + x = 7.592759709 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = 7.592759709 + -6.5 x = 7.592759709 + -6.5 Combine like terms: 7.592759709 + -6.5 = 1.092759709 x = 1.092759709 Simplifying x = 1.092759709

Subproblem 2

x + 6.5 = -7.592759709 Simplifying x + 6.5 = -7.592759709 Reorder the terms: 6.5 + x = -7.592759709 Solving 6.5 + x = -7.592759709 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6.5' to each side of the equation. 6.5 + -6.5 + x = -7.592759709 + -6.5 Combine like terms: 6.5 + -6.5 = 0.0 0.0 + x = -7.592759709 + -6.5 x = -7.592759709 + -6.5 Combine like terms: -7.592759709 + -6.5 = -14.092759709 x = -14.092759709 Simplifying x = -14.092759709

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.092759709, -14.092759709}

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