8y^2-2y-1=-6

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Solution for 8y^2-2y-1=-6 equation:


Simplifying
8y2 + -2y + -1 = -6

Reorder the terms:
-1 + -2y + 8y2 = -6

Solving
-1 + -2y + 8y2 = -6

Solving for variable 'y'.

Reorder the terms:
-1 + 6 + -2y + 8y2 = -6 + 6

Combine like terms: -1 + 6 = 5
5 + -2y + 8y2 = -6 + 6

Combine like terms: -6 + 6 = 0
5 + -2y + 8y2 = 0

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

Divide each side by '8'.
0.625 + -0.25y + y2 = 0

Move the constant term to the right:

Add '-0.625' to each side of the equation.
0.625 + -0.25y + -0.625 + y2 = 0 + -0.625

Reorder the terms:
0.625 + -0.625 + -0.25y + y2 = 0 + -0.625

Combine like terms: 0.625 + -0.625 = 0.000
0.000 + -0.25y + y2 = 0 + -0.625
-0.25y + y2 = 0 + -0.625

Combine like terms: 0 + -0.625 = -0.625
-0.25y + y2 = -0.625

The y term is -0.25y.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25y + 0.015625 + y2 = -0.625 + 0.015625

Reorder the terms:
0.015625 + -0.25y + y2 = -0.625 + 0.015625

Combine like terms: -0.625 + 0.015625 = -0.609375
0.015625 + -0.25y + y2 = -0.609375

Factor a perfect square on the left side:
(y + -0.125)(y + -0.125) = -0.609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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