18x^2-55x+5=0

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Solution for 18x^2-55x+5=0 equation:


Simplifying
18x2 + -55x + 5 = 0

Reorder the terms:
5 + -55x + 18x2 = 0

Solving
5 + -55x + 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'.
0.2777777778 + -3.055555556x + x2 = 0

Move the constant term to the right:

Add '-0.2777777778' to each side of the equation.
0.2777777778 + -3.055555556x + -0.2777777778 + x2 = 0 + -0.2777777778

Reorder the terms:
0.2777777778 + -0.2777777778 + -3.055555556x + x2 = 0 + -0.2777777778

Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000
0.0000000000 + -3.055555556x + x2 = 0 + -0.2777777778
-3.055555556x + x2 = 0 + -0.2777777778

Combine like terms: 0 + -0.2777777778 = -0.2777777778
-3.055555556x + x2 = -0.2777777778

The x term is -3.055555556x.  Take half its coefficient (-1.527777778).
Square it (2.334104939) and add it to both sides.

Add '2.334104939' to each side of the equation.
-3.055555556x + 2.334104939 + x2 = -0.2777777778 + 2.334104939

Reorder the terms:
2.334104939 + -3.055555556x + x2 = -0.2777777778 + 2.334104939

Combine like terms: -0.2777777778 + 2.334104939 = 2.0563271612
2.334104939 + -3.055555556x + x2 = 2.0563271612

Factor a perfect square on the left side:
(x + -1.527777778)(x + -1.527777778) = 2.0563271612

Calculate the square root of the right side: 1.433989945

Break this problem into two subproblems by setting 
(x + -1.527777778) equal to 1.433989945 and -1.433989945.

Subproblem 1

x + -1.527777778 = 1.433989945 Simplifying x + -1.527777778 = 1.433989945 Reorder the terms: -1.527777778 + x = 1.433989945 Solving -1.527777778 + x = 1.433989945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.527777778' to each side of the equation. -1.527777778 + 1.527777778 + x = 1.433989945 + 1.527777778 Combine like terms: -1.527777778 + 1.527777778 = 0.000000000 0.000000000 + x = 1.433989945 + 1.527777778 x = 1.433989945 + 1.527777778 Combine like terms: 1.433989945 + 1.527777778 = 2.961767723 x = 2.961767723 Simplifying x = 2.961767723

Subproblem 2

x + -1.527777778 = -1.433989945 Simplifying x + -1.527777778 = -1.433989945 Reorder the terms: -1.527777778 + x = -1.433989945 Solving -1.527777778 + x = -1.433989945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.527777778' to each side of the equation. -1.527777778 + 1.527777778 + x = -1.433989945 + 1.527777778 Combine like terms: -1.527777778 + 1.527777778 = 0.000000000 0.000000000 + x = -1.433989945 + 1.527777778 x = -1.433989945 + 1.527777778 Combine like terms: -1.433989945 + 1.527777778 = 0.093787833 x = 0.093787833 Simplifying x = 0.093787833

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.961767723, 0.093787833}

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