9y^2-9y+4=0

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Solution for 9y^2-9y+4=0 equation:


Simplifying
9y2 + -9y + 4 = 0

Reorder the terms:
4 + -9y + 9y2 = 0

Solving
4 + -9y + 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'.
0.4444444444 + -1y + y2 = 0

Move the constant term to the right:

Add '-0.4444444444' to each side of the equation.
0.4444444444 + -1y + -0.4444444444 + y2 = 0 + -0.4444444444

Reorder the terms:
0.4444444444 + -0.4444444444 + -1y + y2 = 0 + -0.4444444444

Combine like terms: 0.4444444444 + -0.4444444444 = 0.0000000000
0.0000000000 + -1y + y2 = 0 + -0.4444444444
-1y + y2 = 0 + -0.4444444444

Combine like terms: 0 + -0.4444444444 = -0.4444444444
-1y + y2 = -0.4444444444

The y term is -1y.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1y + 0.25 + y2 = -0.4444444444 + 0.25

Reorder the terms:
0.25 + -1y + y2 = -0.4444444444 + 0.25

Combine like terms: -0.4444444444 + 0.25 = -0.1944444444
0.25 + -1y + y2 = -0.1944444444

Factor a perfect square on the left side:
(y + -0.5)(y + -0.5) = -0.1944444444

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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