.2466-1.8x=x^2

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Solution for .2466-1.8x=x^2 equation:


Simplifying
0.2466 + -1.8x = x2

Solving
0.2466 + -1.8x = x2

Solving for variable 'x'.

Combine like terms: x2 + -1x2 = 0
0.2466 + -1.8x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-0.2466 + 1.8x + x2 = 0

Move the constant term to the right:

Add '0.2466' to each side of the equation.
-0.2466 + 1.8x + 0.2466 + x2 = 0 + 0.2466

Reorder the terms:
-0.2466 + 0.2466 + 1.8x + x2 = 0 + 0.2466

Combine like terms: -0.2466 + 0.2466 = 0.0000
0.0000 + 1.8x + x2 = 0 + 0.2466
1.8x + x2 = 0 + 0.2466

Combine like terms: 0 + 0.2466 = 0.2466
1.8x + x2 = 0.2466

The x term is 1.8x.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.8x + 0.81 + x2 = 0.2466 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 0.2466 + 0.81

Combine like terms: 0.2466 + 0.81 = 1.0566
0.81 + 1.8x + x2 = 1.0566

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 1.0566

Calculate the square root of the right side: 1.027910502

Break this problem into two subproblems by setting 
(x + 0.9) equal to 1.027910502 and -1.027910502.

Subproblem 1

x + 0.9 = 1.027910502 Simplifying x + 0.9 = 1.027910502 Reorder the terms: 0.9 + x = 1.027910502 Solving 0.9 + x = 1.027910502 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 1.027910502 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 1.027910502 + -0.9 x = 1.027910502 + -0.9 Combine like terms: 1.027910502 + -0.9 = 0.127910502 x = 0.127910502 Simplifying x = 0.127910502

Subproblem 2

x + 0.9 = -1.027910502 Simplifying x + 0.9 = -1.027910502 Reorder the terms: 0.9 + x = -1.027910502 Solving 0.9 + x = -1.027910502 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -1.027910502 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -1.027910502 + -0.9 x = -1.027910502 + -0.9 Combine like terms: -1.027910502 + -0.9 = -1.927910502 x = -1.927910502 Simplifying x = -1.927910502

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.127910502, -1.927910502}

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