18x^2=1-x

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Solution for 18x^2=1-x equation:


Simplifying
18x2 = 1 + -1x

Solving
18x2 = 1 + -1x

Solving for variable 'x'.

Reorder the terms:
-1 + x + 18x2 = 1 + -1x + -1 + x

Reorder the terms:
-1 + x + 18x2 = 1 + -1 + -1x + x

Combine like terms: 1 + -1 = 0
-1 + x + 18x2 = 0 + -1x + x
-1 + x + 18x2 = -1x + x

Combine like terms: -1x + x = 0
-1 + x + 18x2 = 0

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

Divide each side by '18'.
-0.05555555556 + 0.05555555556x + x2 = 0

Move the constant term to the right:

Add '0.05555555556' to each side of the equation.
-0.05555555556 + 0.05555555556x + 0.05555555556 + x2 = 0 + 0.05555555556

Reorder the terms:
-0.05555555556 + 0.05555555556 + 0.05555555556x + x2 = 0 + 0.05555555556

Combine like terms: -0.05555555556 + 0.05555555556 = 0.00000000000
0.00000000000 + 0.05555555556x + x2 = 0 + 0.05555555556
0.05555555556x + x2 = 0 + 0.05555555556

Combine like terms: 0 + 0.05555555556 = 0.05555555556
0.05555555556x + x2 = 0.05555555556

The x term is x.  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.
0.05555555556x + 0.25 + x2 = 0.05555555556 + 0.25

Reorder the terms:
0.25 + 0.05555555556x + x2 = 0.05555555556 + 0.25

Combine like terms: 0.05555555556 + 0.25 = 0.30555555556
0.25 + 0.05555555556x + x2 = 0.30555555556

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.30555555556

Calculate the square root of the right side: 0.552770798

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.552770798 and -0.552770798.

Subproblem 1

x + 0.5 = 0.552770798 Simplifying x + 0.5 = 0.552770798 Reorder the terms: 0.5 + x = 0.552770798 Solving 0.5 + x = 0.552770798 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 = 0.552770798 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.552770798 + -0.5 x = 0.552770798 + -0.5 Combine like terms: 0.552770798 + -0.5 = 0.052770798 x = 0.052770798 Simplifying x = 0.052770798

Subproblem 2

x + 0.5 = -0.552770798 Simplifying x + 0.5 = -0.552770798 Reorder the terms: 0.5 + x = -0.552770798 Solving 0.5 + x = -0.552770798 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 = -0.552770798 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.552770798 + -0.5 x = -0.552770798 + -0.5 Combine like terms: -0.552770798 + -0.5 = -1.052770798 x = -1.052770798 Simplifying x = -1.052770798

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.052770798, -1.052770798}

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