10y^2+8y+5=0

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Solution for 10y^2+8y+5=0 equation:


Simplifying
10y2 + 8y + 5 = 0

Reorder the terms:
5 + 8y + 10y2 = 0

Solving
5 + 8y + 10y2 = 0

Solving for variable 'y'.

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

Divide each side by '10'.
0.5 + 0.8y + y2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + 0.8y + -0.5 + y2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + 0.8y + y2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + 0.8y + y2 = 0 + -0.5
0.8y + y2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
0.8y + y2 = -0.5

The y term is 0.8y.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8y + 0.16 + y2 = -0.5 + 0.16

Reorder the terms:
0.16 + 0.8y + y2 = -0.5 + 0.16

Combine like terms: -0.5 + 0.16 = -0.34
0.16 + 0.8y + y2 = -0.34

Factor a perfect square on the left side:
(y + 0.4)(y + 0.4) = -0.34

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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