8y^2-y=-9

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Solution for 8y^2-y=-9 equation:


Simplifying
8y2 + -1y = -9

Reorder the terms:
-1y + 8y2 = -9

Solving
-1y + 8y2 = -9

Solving for variable 'y'.

Reorder the terms:
9 + -1y + 8y2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + -1y + 8y2 = 0

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

Divide each side by '8'.
1.125 + -0.125y + y2 = 0

Move the constant term to the right:

Add '-1.125' to each side of the equation.
1.125 + -0.125y + -1.125 + y2 = 0 + -1.125

Reorder the terms:
1.125 + -1.125 + -0.125y + y2 = 0 + -1.125

Combine like terms: 1.125 + -1.125 = 0.000
0.000 + -0.125y + y2 = 0 + -1.125
-0.125y + y2 = 0 + -1.125

Combine like terms: 0 + -1.125 = -1.125
-0.125y + y2 = -1.125

The y term is -0.125y.  Take half its coefficient (-0.0625).
Square it (0.00390625) and add it to both sides.

Add '0.00390625' to each side of the equation.
-0.125y + 0.00390625 + y2 = -1.125 + 0.00390625

Reorder the terms:
0.00390625 + -0.125y + y2 = -1.125 + 0.00390625

Combine like terms: -1.125 + 0.00390625 = -1.12109375
0.00390625 + -0.125y + y2 = -1.12109375

Factor a perfect square on the left side:
(y + -0.0625)(y + -0.0625) = -1.12109375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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