8y^2=-7y-8

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Solution for 8y^2=-7y-8 equation:


Simplifying
8y2 = -7y + -8

Reorder the terms:
8y2 = -8 + -7y

Solving
8y2 = -8 + -7y

Solving for variable 'y'.

Reorder the terms:
8 + 7y + 8y2 = -8 + -7y + 8 + 7y

Reorder the terms:
8 + 7y + 8y2 = -8 + 8 + -7y + 7y

Combine like terms: -8 + 8 = 0
8 + 7y + 8y2 = 0 + -7y + 7y
8 + 7y + 8y2 = -7y + 7y

Combine like terms: -7y + 7y = 0
8 + 7y + 8y2 = 0

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

Divide each side by '8'.
1 + 0.875y + y2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 0.875y + -1 + y2 = 0 + -1

Reorder the terms:
1 + -1 + 0.875y + y2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 0.875y + y2 = 0 + -1
0.875y + y2 = 0 + -1

Combine like terms: 0 + -1 = -1
0.875y + y2 = -1

The y term is 0.875y.  Take half its coefficient (0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
0.875y + 0.19140625 + y2 = -1 + 0.19140625

Reorder the terms:
0.19140625 + 0.875y + y2 = -1 + 0.19140625

Combine like terms: -1 + 0.19140625 = -0.80859375
0.19140625 + 0.875y + y2 = -0.80859375

Factor a perfect square on the left side:
(y + 0.4375)(y + 0.4375) = -0.80859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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