18*x^2=4*x+23

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Solution for 18*x^2=4*x+23 equation:


Simplifying
18x2 = 4x + 23

Reorder the terms:
18x2 = 23 + 4x

Solving
18x2 = 23 + 4x

Solving for variable 'x'.

Reorder the terms:
-23 + -4x + 18x2 = 23 + 4x + -23 + -4x

Reorder the terms:
-23 + -4x + 18x2 = 23 + -23 + 4x + -4x

Combine like terms: 23 + -23 = 0
-23 + -4x + 18x2 = 0 + 4x + -4x
-23 + -4x + 18x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-23 + -4x + 18x2 = 0

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

Divide each side by '18'.
-1.277777778 + -0.2222222222x + x2 = 0

Move the constant term to the right:

Add '1.277777778' to each side of the equation.
-1.277777778 + -0.2222222222x + 1.277777778 + x2 = 0 + 1.277777778

Reorder the terms:
-1.277777778 + 1.277777778 + -0.2222222222x + x2 = 0 + 1.277777778

Combine like terms: -1.277777778 + 1.277777778 = 0.000000000
0.000000000 + -0.2222222222x + x2 = 0 + 1.277777778
-0.2222222222x + x2 = 0 + 1.277777778

Combine like terms: 0 + 1.277777778 = 1.277777778
-0.2222222222x + x2 = 1.277777778

The x term is -0.2222222222x.  Take half its coefficient (-0.1111111111).
Square it (0.01234567901) and add it to both sides.

Add '0.01234567901' to each side of the equation.
-0.2222222222x + 0.01234567901 + x2 = 1.277777778 + 0.01234567901

Reorder the terms:
0.01234567901 + -0.2222222222x + x2 = 1.277777778 + 0.01234567901

Combine like terms: 1.277777778 + 0.01234567901 = 1.29012345701
0.01234567901 + -0.2222222222x + x2 = 1.29012345701

Factor a perfect square on the left side:
(x + -0.1111111111)(x + -0.1111111111) = 1.29012345701

Calculate the square root of the right side: 1.135836017

Break this problem into two subproblems by setting 
(x + -0.1111111111) equal to 1.135836017 and -1.135836017.

Subproblem 1

x + -0.1111111111 = 1.135836017 Simplifying x + -0.1111111111 = 1.135836017 Reorder the terms: -0.1111111111 + x = 1.135836017 Solving -0.1111111111 + x = 1.135836017 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1111111111' to each side of the equation. -0.1111111111 + 0.1111111111 + x = 1.135836017 + 0.1111111111 Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000 0.0000000000 + x = 1.135836017 + 0.1111111111 x = 1.135836017 + 0.1111111111 Combine like terms: 1.135836017 + 0.1111111111 = 1.2469471281 x = 1.2469471281 Simplifying x = 1.2469471281

Subproblem 2

x + -0.1111111111 = -1.135836017 Simplifying x + -0.1111111111 = -1.135836017 Reorder the terms: -0.1111111111 + x = -1.135836017 Solving -0.1111111111 + x = -1.135836017 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1111111111' to each side of the equation. -0.1111111111 + 0.1111111111 + x = -1.135836017 + 0.1111111111 Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000 0.0000000000 + x = -1.135836017 + 0.1111111111 x = -1.135836017 + 0.1111111111 Combine like terms: -1.135836017 + 0.1111111111 = -1.0247249059 x = -1.0247249059 Simplifying x = -1.0247249059

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2469471281, -1.0247249059}

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