x^2+56=12x(x+1)

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Solution for x^2+56=12x(x+1) equation:


Simplifying
x2 + 56 = 12x(x + 1)

Reorder the terms:
56 + x2 = 12x(x + 1)

Reorder the terms:
56 + x2 = 12x(1 + x)
56 + x2 = (1 * 12x + x * 12x)
56 + x2 = (12x + 12x2)

Solving
56 + x2 = 12x + 12x2

Solving for variable 'x'.

Reorder the terms:
56 + -12x + x2 + -12x2 = 12x + 12x2 + -12x + -12x2

Combine like terms: x2 + -12x2 = -11x2
56 + -12x + -11x2 = 12x + 12x2 + -12x + -12x2

Reorder the terms:
56 + -12x + -11x2 = 12x + -12x + 12x2 + -12x2

Combine like terms: 12x + -12x = 0
56 + -12x + -11x2 = 0 + 12x2 + -12x2
56 + -12x + -11x2 = 12x2 + -12x2

Combine like terms: 12x2 + -12x2 = 0
56 + -12x + -11x2 = 0

Begin completing the square.  Divide all terms by
-11 the coefficient of the squared term: 

Divide each side by '-11'.
-5.090909091 + 1.090909091x + x2 = 0

Move the constant term to the right:

Add '5.090909091' to each side of the equation.
-5.090909091 + 1.090909091x + 5.090909091 + x2 = 0 + 5.090909091

Reorder the terms:
-5.090909091 + 5.090909091 + 1.090909091x + x2 = 0 + 5.090909091

Combine like terms: -5.090909091 + 5.090909091 = 0.000000000
0.000000000 + 1.090909091x + x2 = 0 + 5.090909091
1.090909091x + x2 = 0 + 5.090909091

Combine like terms: 0 + 5.090909091 = 5.090909091
1.090909091x + x2 = 5.090909091

The x term is 1.090909091x.  Take half its coefficient (0.5454545455).
Square it (0.2975206612) and add it to both sides.

Add '0.2975206612' to each side of the equation.
1.090909091x + 0.2975206612 + x2 = 5.090909091 + 0.2975206612

Reorder the terms:
0.2975206612 + 1.090909091x + x2 = 5.090909091 + 0.2975206612

Combine like terms: 5.090909091 + 0.2975206612 = 5.3884297522
0.2975206612 + 1.090909091x + x2 = 5.3884297522

Factor a perfect square on the left side:
(x + 0.5454545455)(x + 0.5454545455) = 5.3884297522

Calculate the square root of the right side: 2.321299152

Break this problem into two subproblems by setting 
(x + 0.5454545455) equal to 2.321299152 and -2.321299152.

Subproblem 1

x + 0.5454545455 = 2.321299152 Simplifying x + 0.5454545455 = 2.321299152 Reorder the terms: 0.5454545455 + x = 2.321299152 Solving 0.5454545455 + x = 2.321299152 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5454545455' to each side of the equation. 0.5454545455 + -0.5454545455 + x = 2.321299152 + -0.5454545455 Combine like terms: 0.5454545455 + -0.5454545455 = 0.0000000000 0.0000000000 + x = 2.321299152 + -0.5454545455 x = 2.321299152 + -0.5454545455 Combine like terms: 2.321299152 + -0.5454545455 = 1.7758446065 x = 1.7758446065 Simplifying x = 1.7758446065

Subproblem 2

x + 0.5454545455 = -2.321299152 Simplifying x + 0.5454545455 = -2.321299152 Reorder the terms: 0.5454545455 + x = -2.321299152 Solving 0.5454545455 + x = -2.321299152 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5454545455' to each side of the equation. 0.5454545455 + -0.5454545455 + x = -2.321299152 + -0.5454545455 Combine like terms: 0.5454545455 + -0.5454545455 = 0.0000000000 0.0000000000 + x = -2.321299152 + -0.5454545455 x = -2.321299152 + -0.5454545455 Combine like terms: -2.321299152 + -0.5454545455 = -2.8667536975 x = -2.8667536975 Simplifying x = -2.8667536975

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7758446065, -2.8667536975}

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