15x^2-18x+1=0

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Solution for 15x^2-18x+1=0 equation:


Simplifying
15x2 + -18x + 1 = 0

Reorder the terms:
1 + -18x + 15x2 = 0

Solving
1 + -18x + 15x2 = 0

Solving for variable 'x'.

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

Divide each side by '15'.
0.06666666667 + -1.2x + x2 = 0

Move the constant term to the right:

Add '-0.06666666667' to each side of the equation.
0.06666666667 + -1.2x + -0.06666666667 + x2 = 0 + -0.06666666667

Reorder the terms:
0.06666666667 + -0.06666666667 + -1.2x + x2 = 0 + -0.06666666667

Combine like terms: 0.06666666667 + -0.06666666667 = 0.00000000000
0.00000000000 + -1.2x + x2 = 0 + -0.06666666667
-1.2x + x2 = 0 + -0.06666666667

Combine like terms: 0 + -0.06666666667 = -0.06666666667
-1.2x + x2 = -0.06666666667

The x term is -1.2x.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2x + 0.36 + x2 = -0.06666666667 + 0.36

Reorder the terms:
0.36 + -1.2x + x2 = -0.06666666667 + 0.36

Combine like terms: -0.06666666667 + 0.36 = 0.29333333333
0.36 + -1.2x + x2 = 0.29333333333

Factor a perfect square on the left side:
(x + -0.6)(x + -0.6) = 0.29333333333

Calculate the square root of the right side: 0.54160256

Break this problem into two subproblems by setting 
(x + -0.6) equal to 0.54160256 and -0.54160256.

Subproblem 1

x + -0.6 = 0.54160256 Simplifying x + -0.6 = 0.54160256 Reorder the terms: -0.6 + x = 0.54160256 Solving -0.6 + x = 0.54160256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = 0.54160256 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = 0.54160256 + 0.6 x = 0.54160256 + 0.6 Combine like terms: 0.54160256 + 0.6 = 1.14160256 x = 1.14160256 Simplifying x = 1.14160256

Subproblem 2

x + -0.6 = -0.54160256 Simplifying x + -0.6 = -0.54160256 Reorder the terms: -0.6 + x = -0.54160256 Solving -0.6 + x = -0.54160256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + x = -0.54160256 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = -0.54160256 + 0.6 x = -0.54160256 + 0.6 Combine like terms: -0.54160256 + 0.6 = 0.05839744 x = 0.05839744 Simplifying x = 0.05839744

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.14160256, 0.05839744}

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