9y^2-13y+42=0

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Solution for 9y^2-13y+42=0 equation:


Simplifying
9y2 + -13y + 42 = 0

Reorder the terms:
42 + -13y + 9y2 = 0

Solving
42 + -13y + 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'.
4.666666667 + -1.444444444y + y2 = 0

Move the constant term to the right:

Add '-4.666666667' to each side of the equation.
4.666666667 + -1.444444444y + -4.666666667 + y2 = 0 + -4.666666667

Reorder the terms:
4.666666667 + -4.666666667 + -1.444444444y + y2 = 0 + -4.666666667

Combine like terms: 4.666666667 + -4.666666667 = 0.000000000
0.000000000 + -1.444444444y + y2 = 0 + -4.666666667
-1.444444444y + y2 = 0 + -4.666666667

Combine like terms: 0 + -4.666666667 = -4.666666667
-1.444444444y + y2 = -4.666666667

The y term is -1.444444444y.  Take half its coefficient (-0.722222222).
Square it (0.5216049380) and add it to both sides.

Add '0.5216049380' to each side of the equation.
-1.444444444y + 0.5216049380 + y2 = -4.666666667 + 0.5216049380

Reorder the terms:
0.5216049380 + -1.444444444y + y2 = -4.666666667 + 0.5216049380

Combine like terms: -4.666666667 + 0.5216049380 = -4.145061729
0.5216049380 + -1.444444444y + y2 = -4.145061729

Factor a perfect square on the left side:
(y + -0.722222222)(y + -0.722222222) = -4.145061729

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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