x(x+1)=.19

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Solution for x(x+1)=.19 equation:


Simplifying
x(x + 1) = 0.19

Reorder the terms:
x(1 + x) = 0.19
(1 * x + x * x) = 0.19
(1x + x2) = 0.19

Solving
1x + x2 = 0.19

Solving for variable 'x'.

Reorder the terms:
-0.19 + 1x + x2 = 0.19 + -0.19

Combine like terms: 0.19 + -0.19 = 0.00
-0.19 + 1x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '0.19' to each side of the equation.
-0.19 + 1x + 0.19 + x2 = 0.00 + 0.19

Reorder the terms:
-0.19 + 0.19 + 1x + x2 = 0.00 + 0.19

Combine like terms: -0.19 + 0.19 = 0.00
0.00 + 1x + x2 = 0.00 + 0.19
1x + x2 = 0.00 + 0.19

Combine like terms: 0.00 + 0.19 = 0.19
1x + x2 = 0.19

The x term is 1x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 0.19 + 0.25

Reorder the terms:
0.25 + x + x2 = 0.19 + 0.25

Combine like terms: 0.19 + 0.25 = 0.44
0.25 + x + x2 = 0.44

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.44

Calculate the square root of the right side: 0.663324958

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.663324958 and -0.663324958.

Subproblem 1

x + 0.5 = 0.663324958 Simplifying x + 0.5 = 0.663324958 Reorder the terms: 0.5 + x = 0.663324958 Solving 0.5 + x = 0.663324958 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 0.663324958 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.663324958 + -0.5 x = 0.663324958 + -0.5 Combine like terms: 0.663324958 + -0.5 = 0.163324958 x = 0.163324958 Simplifying x = 0.163324958

Subproblem 2

x + 0.5 = -0.663324958 Simplifying x + 0.5 = -0.663324958 Reorder the terms: 0.5 + x = -0.663324958 Solving 0.5 + x = -0.663324958 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -0.663324958 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.663324958 + -0.5 x = -0.663324958 + -0.5 Combine like terms: -0.663324958 + -0.5 = -1.163324958 x = -1.163324958 Simplifying x = -1.163324958

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.163324958, -1.163324958}

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