10y^2+10y+3=0

Solution for 10y^2+10y+3=0 equation:

Simplifying
10y2 + 10y + 3 = 0

Reorder the terms:
3 + 10y + 10y2 = 0

Solving
3 + 10y + 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'.
0.3 + y + y2 = 0

Move the constant term to the right:

Add '-0.3' to each side of the equation.
0.3 + y + -0.3 + y2 = 0 + -0.3

Reorder the terms:
0.3 + -0.3 + y + y2 = 0 + -0.3

Combine like terms: 0.3 + -0.3 = 0.0
0.0 + y + y2 = 0 + -0.3
y + y2 = 0 + -0.3

Combine like terms: 0 + -0.3 = -0.3
y + y2 = -0.3

The y term is y.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + y2 = -0.3 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + y2 = -0.3 + 0.25

Combine like terms: -0.3 + 0.25 = -0.05
1.25 + y2 = -0.05

Factor a perfect square on the left side:
(y + 0.5)(y + 0.5) = -0.05

Can't calculate square root of the right side.

The solution to this equation could not be determined.