9y^2-14y+1=0

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Solution for 9y^2-14y+1=0 equation:


Simplifying
9y2 + -14y + 1 = 0

Reorder the terms:
1 + -14y + 9y2 = 0

Solving
1 + -14y + 9y2 = 0

Solving for variable 'y'.

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

Divide each side by '9'.
0.1111111111 + -1.555555556y + y2 = 0

Move the constant term to the right:

Add '-0.1111111111' to each side of the equation.
0.1111111111 + -1.555555556y + -0.1111111111 + y2 = 0 + -0.1111111111

Reorder the terms:
0.1111111111 + -0.1111111111 + -1.555555556y + y2 = 0 + -0.1111111111

Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000
0.0000000000 + -1.555555556y + y2 = 0 + -0.1111111111
-1.555555556y + y2 = 0 + -0.1111111111

Combine like terms: 0 + -0.1111111111 = -0.1111111111
-1.555555556y + y2 = -0.1111111111

The y term is -1.555555556y.  Take half its coefficient (-0.777777778).
Square it (0.6049382720) and add it to both sides.

Add '0.6049382720' to each side of the equation.
-1.555555556y + 0.6049382720 + y2 = -0.1111111111 + 0.6049382720

Reorder the terms:
0.6049382720 + -1.555555556y + y2 = -0.1111111111 + 0.6049382720

Combine like terms: -0.1111111111 + 0.6049382720 = 0.4938271609
0.6049382720 + -1.555555556y + y2 = 0.4938271609

Factor a perfect square on the left side:
(y + -0.777777778)(y + -0.777777778) = 0.4938271609

Calculate the square root of the right side: 0.702728369

Break this problem into two subproblems by setting 
(y + -0.777777778) equal to 0.702728369 and -0.702728369.

Subproblem 1

y + -0.777777778 = 0.702728369 Simplifying y + -0.777777778 = 0.702728369 Reorder the terms: -0.777777778 + y = 0.702728369 Solving -0.777777778 + y = 0.702728369 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.777777778' to each side of the equation. -0.777777778 + 0.777777778 + y = 0.702728369 + 0.777777778 Combine like terms: -0.777777778 + 0.777777778 = 0.000000000 0.000000000 + y = 0.702728369 + 0.777777778 y = 0.702728369 + 0.777777778 Combine like terms: 0.702728369 + 0.777777778 = 1.480506147 y = 1.480506147 Simplifying y = 1.480506147

Subproblem 2

y + -0.777777778 = -0.702728369 Simplifying y + -0.777777778 = -0.702728369 Reorder the terms: -0.777777778 + y = -0.702728369 Solving -0.777777778 + y = -0.702728369 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.777777778' to each side of the equation. -0.777777778 + 0.777777778 + y = -0.702728369 + 0.777777778 Combine like terms: -0.777777778 + 0.777777778 = 0.000000000 0.000000000 + y = -0.702728369 + 0.777777778 y = -0.702728369 + 0.777777778 Combine like terms: -0.702728369 + 0.777777778 = 0.075049409 y = 0.075049409 Simplifying y = 0.075049409

Solution

The solution to the problem is based on the solutions from the subproblems. y = {1.480506147, 0.075049409}

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