.10x(x+100)+.10x=11

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Solution for .10x(x+100)+.10x=11 equation:


Simplifying
0.10x(x + 100) + 0.10x = 11

Reorder the terms:
0.10x(100 + x) + 0.10x = 11
(100 * 0.10x + x * 0.10x) + 0.10x = 11
(10x + 0.10x2) + 0.10x = 11

Reorder the terms:
10x + 0.10x + 0.10x2 = 11

Combine like terms: 10x + 0.10x = 10.1x
10.1x + 0.10x2 = 11

Solving
10.1x + 0.10x2 = 11

Solving for variable 'x'.

Reorder the terms:
-11 + 10.1x + 0.10x2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + 10.1x + 0.10x2 = 0

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

Divide each side by '0.10'.
-110 + 101x + x2 = 0

Move the constant term to the right:

Add '110' to each side of the equation.
-110 + 101x + 110 + x2 = 0 + 110

Reorder the terms:
-110 + 110 + 101x + x2 = 0 + 110

Combine like terms: -110 + 110 = 0
0 + 101x + x2 = 0 + 110
101x + x2 = 0 + 110

Combine like terms: 0 + 110 = 110
101x + x2 = 110

The x term is 101x.  Take half its coefficient (50.5).
Square it (2550.25) and add it to both sides.

Add '2550.25' to each side of the equation.
101x + 2550.25 + x2 = 110 + 2550.25

Reorder the terms:
2550.25 + 101x + x2 = 110 + 2550.25

Combine like terms: 110 + 2550.25 = 2660.25
2550.25 + 101x + x2 = 2660.25

Factor a perfect square on the left side:
(x + 50.5)(x + 50.5) = 2660.25

Calculate the square root of the right side: 51.577611422

Break this problem into two subproblems by setting 
(x + 50.5) equal to 51.577611422 and -51.577611422.

Subproblem 1

x + 50.5 = 51.577611422 Simplifying x + 50.5 = 51.577611422 Reorder the terms: 50.5 + x = 51.577611422 Solving 50.5 + x = 51.577611422 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50.5' to each side of the equation. 50.5 + -50.5 + x = 51.577611422 + -50.5 Combine like terms: 50.5 + -50.5 = 0.0 0.0 + x = 51.577611422 + -50.5 x = 51.577611422 + -50.5 Combine like terms: 51.577611422 + -50.5 = 1.077611422 x = 1.077611422 Simplifying x = 1.077611422

Subproblem 2

x + 50.5 = -51.577611422 Simplifying x + 50.5 = -51.577611422 Reorder the terms: 50.5 + x = -51.577611422 Solving 50.5 + x = -51.577611422 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50.5' to each side of the equation. 50.5 + -50.5 + x = -51.577611422 + -50.5 Combine like terms: 50.5 + -50.5 = 0.0 0.0 + x = -51.577611422 + -50.5 x = -51.577611422 + -50.5 Combine like terms: -51.577611422 + -50.5 = -102.077611422 x = -102.077611422 Simplifying x = -102.077611422

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.077611422, -102.077611422}

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