18x^2+4x-3=0

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Solution for 18x^2+4x-3=0 equation:


Simplifying
18x2 + 4x + -3 = 0

Reorder the terms:
-3 + 4x + 18x2 = 0

Solving
-3 + 4x + 18x2 = 0

Solving for variable 'x'.

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

Divide each side by '18'.
-0.1666666667 + 0.2222222222x + x2 = 0

Move the constant term to the right:

Add '0.1666666667' to each side of the equation.
-0.1666666667 + 0.2222222222x + 0.1666666667 + x2 = 0 + 0.1666666667

Reorder the terms:
-0.1666666667 + 0.1666666667 + 0.2222222222x + x2 = 0 + 0.1666666667

Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000
0.0000000000 + 0.2222222222x + x2 = 0 + 0.1666666667
0.2222222222x + x2 = 0 + 0.1666666667

Combine like terms: 0 + 0.1666666667 = 0.1666666667
0.2222222222x + x2 = 0.1666666667

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 = 0.1666666667 + 0.01234567901

Reorder the terms:
0.01234567901 + 0.2222222222x + x2 = 0.1666666667 + 0.01234567901

Combine like terms: 0.1666666667 + 0.01234567901 = 0.17901234571
0.01234567901 + 0.2222222222x + x2 = 0.17901234571

Factor a perfect square on the left side:
(x + 0.1111111111)(x + 0.1111111111) = 0.17901234571

Calculate the square root of the right side: 0.423098506

Break this problem into two subproblems by setting 
(x + 0.1111111111) equal to 0.423098506 and -0.423098506.

Subproblem 1

x + 0.1111111111 = 0.423098506 Simplifying x + 0.1111111111 = 0.423098506 Reorder the terms: 0.1111111111 + x = 0.423098506 Solving 0.1111111111 + x = 0.423098506 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 = 0.423098506 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + x = 0.423098506 + -0.1111111111 x = 0.423098506 + -0.1111111111 Combine like terms: 0.423098506 + -0.1111111111 = 0.3119873949 x = 0.3119873949 Simplifying x = 0.3119873949

Subproblem 2

x + 0.1111111111 = -0.423098506 Simplifying x + 0.1111111111 = -0.423098506 Reorder the terms: 0.1111111111 + x = -0.423098506 Solving 0.1111111111 + x = -0.423098506 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 = -0.423098506 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + x = -0.423098506 + -0.1111111111 x = -0.423098506 + -0.1111111111 Combine like terms: -0.423098506 + -0.1111111111 = -0.5342096171 x = -0.5342096171 Simplifying x = -0.5342096171

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.3119873949, -0.5342096171}

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