(1+x)(1+x)=1.23

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Solution for (1+x)(1+x)=1.23 equation:


Simplifying
(1 + x)(1 + x) = 1.23

Multiply (1 + x) * (1 + x)
(1(1 + x) + x(1 + x)) = 1.23
((1 * 1 + x * 1) + x(1 + x)) = 1.23
((1 + 1x) + x(1 + x)) = 1.23
(1 + 1x + (1 * x + x * x)) = 1.23
(1 + 1x + (1x + x2)) = 1.23

Combine like terms: 1x + 1x = 2x
(1 + 2x + x2) = 1.23

Solving
1 + 2x + x2 = 1.23

Solving for variable 'x'.

Reorder the terms:
1 + -1.23 + 2x + x2 = 1.23 + -1.23

Combine like terms: 1 + -1.23 = -0.23
-0.23 + 2x + x2 = 1.23 + -1.23

Combine like terms: 1.23 + -1.23 = 0.00
-0.23 + 2x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '0.23' to each side of the equation.
-0.23 + 2x + 0.23 + x2 = 0.00 + 0.23

Reorder the terms:
-0.23 + 0.23 + 2x + x2 = 0.00 + 0.23

Combine like terms: -0.23 + 0.23 = 0.00
0.00 + 2x + x2 = 0.00 + 0.23
2x + x2 = 0.00 + 0.23

Combine like terms: 0.00 + 0.23 = 0.23
2x + x2 = 0.23

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.23 + 1

Reorder the terms:
1 + 2x + x2 = 0.23 + 1

Combine like terms: 0.23 + 1 = 1.23
1 + 2x + x2 = 1.23

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.23

Calculate the square root of the right side: 1.109053651

Break this problem into two subproblems by setting 
(x + 1) equal to 1.109053651 and -1.109053651.

Subproblem 1

x + 1 = 1.109053651 Simplifying x + 1 = 1.109053651 Reorder the terms: 1 + x = 1.109053651 Solving 1 + x = 1.109053651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.109053651 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.109053651 + -1 x = 1.109053651 + -1 Combine like terms: 1.109053651 + -1 = 0.109053651 x = 0.109053651 Simplifying x = 0.109053651

Subproblem 2

x + 1 = -1.109053651 Simplifying x + 1 = -1.109053651 Reorder the terms: 1 + x = -1.109053651 Solving 1 + x = -1.109053651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.109053651 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.109053651 + -1 x = -1.109053651 + -1 Combine like terms: -1.109053651 + -1 = -2.109053651 x = -2.109053651 Simplifying x = -2.109053651

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.109053651, -2.109053651}

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