(11x+2)(8x+20)=x

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Solution for (11x+2)(8x+20)=x equation:


Simplifying
(11x + 2)(8x + 20) = x

Reorder the terms:
(2 + 11x)(8x + 20) = x

Reorder the terms:
(2 + 11x)(20 + 8x) = x

Multiply (2 + 11x) * (20 + 8x)
(2(20 + 8x) + 11x * (20 + 8x)) = x
((20 * 2 + 8x * 2) + 11x * (20 + 8x)) = x
((40 + 16x) + 11x * (20 + 8x)) = x
(40 + 16x + (20 * 11x + 8x * 11x)) = x
(40 + 16x + (220x + 88x2)) = x

Combine like terms: 16x + 220x = 236x
(40 + 236x + 88x2) = x

Solving
40 + 236x + 88x2 = x

Solving for variable 'x'.

Reorder the terms:
40 + 236x + -1x + 88x2 = x + -1x

Combine like terms: 236x + -1x = 235x
40 + 235x + 88x2 = x + -1x

Combine like terms: x + -1x = 0
40 + 235x + 88x2 = 0

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

Divide each side by '88'.
0.4545454545 + 2.670454545x + x2 = 0

Move the constant term to the right:

Add '-0.4545454545' to each side of the equation.
0.4545454545 + 2.670454545x + -0.4545454545 + x2 = 0 + -0.4545454545

Reorder the terms:
0.4545454545 + -0.4545454545 + 2.670454545x + x2 = 0 + -0.4545454545

Combine like terms: 0.4545454545 + -0.4545454545 = 0.0000000000
0.0000000000 + 2.670454545x + x2 = 0 + -0.4545454545
2.670454545x + x2 = 0 + -0.4545454545

Combine like terms: 0 + -0.4545454545 = -0.4545454545
2.670454545x + x2 = -0.4545454545

The x term is 2.670454545x.  Take half its coefficient (1.335227273).
Square it (1.782831871) and add it to both sides.

Add '1.782831871' to each side of the equation.
2.670454545x + 1.782831871 + x2 = -0.4545454545 + 1.782831871

Reorder the terms:
1.782831871 + 2.670454545x + x2 = -0.4545454545 + 1.782831871

Combine like terms: -0.4545454545 + 1.782831871 = 1.3282864165
1.782831871 + 2.670454545x + x2 = 1.3282864165

Factor a perfect square on the left side:
(x + 1.335227273)(x + 1.335227273) = 1.3282864165

Calculate the square root of the right side: 1.152513087

Break this problem into two subproblems by setting 
(x + 1.335227273) equal to 1.152513087 and -1.152513087.

Subproblem 1

x + 1.335227273 = 1.152513087 Simplifying x + 1.335227273 = 1.152513087 Reorder the terms: 1.335227273 + x = 1.152513087 Solving 1.335227273 + x = 1.152513087 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.335227273' to each side of the equation. 1.335227273 + -1.335227273 + x = 1.152513087 + -1.335227273 Combine like terms: 1.335227273 + -1.335227273 = 0.000000000 0.000000000 + x = 1.152513087 + -1.335227273 x = 1.152513087 + -1.335227273 Combine like terms: 1.152513087 + -1.335227273 = -0.182714186 x = -0.182714186 Simplifying x = -0.182714186

Subproblem 2

x + 1.335227273 = -1.152513087 Simplifying x + 1.335227273 = -1.152513087 Reorder the terms: 1.335227273 + x = -1.152513087 Solving 1.335227273 + x = -1.152513087 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.335227273' to each side of the equation. 1.335227273 + -1.335227273 + x = -1.152513087 + -1.335227273 Combine like terms: 1.335227273 + -1.335227273 = 0.000000000 0.000000000 + x = -1.152513087 + -1.335227273 x = -1.152513087 + -1.335227273 Combine like terms: -1.152513087 + -1.335227273 = -2.48774036 x = -2.48774036 Simplifying x = -2.48774036

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.182714186, -2.48774036}

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