x(1+x)=1.05

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Solution for x(1+x)=1.05 equation:


Simplifying
x(1 + x) = 1.05
(1 * x + x * x) = 1.05
(1x + x2) = 1.05

Solving
1x + x2 = 1.05

Solving for variable 'x'.

Reorder the terms:
-1.05 + 1x + x2 = 1.05 + -1.05

Combine like terms: 1.05 + -1.05 = 0.00
-1.05 + 1x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '1.05' to each side of the equation.
-1.05 + 1x + 1.05 + x2 = 0.00 + 1.05

Reorder the terms:
-1.05 + 1.05 + 1x + x2 = 0.00 + 1.05

Combine like terms: -1.05 + 1.05 = 0.00
0.00 + 1x + x2 = 0.00 + 1.05
1x + x2 = 0.00 + 1.05

Combine like terms: 0.00 + 1.05 = 1.05
1x + x2 = 1.05

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 = 1.05 + 0.25

Reorder the terms:
0.25 + x + x2 = 1.05 + 0.25

Combine like terms: 1.05 + 0.25 = 1.3
0.25 + x + x2 = 1.3

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 1.3

Calculate the square root of the right side: 1.140175425

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.140175425 and -1.140175425.

Subproblem 1

x + 0.5 = 1.140175425 Simplifying x + 0.5 = 1.140175425 Reorder the terms: 0.5 + x = 1.140175425 Solving 0.5 + x = 1.140175425 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 = 1.140175425 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.140175425 + -0.5 x = 1.140175425 + -0.5 Combine like terms: 1.140175425 + -0.5 = 0.640175425 x = 0.640175425 Simplifying x = 0.640175425

Subproblem 2

x + 0.5 = -1.140175425 Simplifying x + 0.5 = -1.140175425 Reorder the terms: 0.5 + x = -1.140175425 Solving 0.5 + x = -1.140175425 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 = -1.140175425 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.140175425 + -0.5 x = -1.140175425 + -0.5 Combine like terms: -1.140175425 + -0.5 = -1.640175425 x = -1.640175425 Simplifying x = -1.640175425

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.640175425, -1.640175425}

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