5y^2+2y+18=0

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Solution for 5y^2+2y+18=0 equation:


Simplifying
5y2 + 2y + 18 = 0

Reorder the terms:
18 + 2y + 5y2 = 0

Solving
18 + 2y + 5y2 = 0

Solving for variable 'y'.

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

Divide each side by '5'.
3.6 + 0.4y + y2 = 0

Move the constant term to the right:

Add '-3.6' to each side of the equation.
3.6 + 0.4y + -3.6 + y2 = 0 + -3.6

Reorder the terms:
3.6 + -3.6 + 0.4y + y2 = 0 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + 0.4y + y2 = 0 + -3.6
0.4y + y2 = 0 + -3.6

Combine like terms: 0 + -3.6 = -3.6
0.4y + y2 = -3.6

The y term is 0.4y.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4y + 0.04 + y2 = -3.6 + 0.04

Reorder the terms:
0.04 + 0.4y + y2 = -3.6 + 0.04

Combine like terms: -3.6 + 0.04 = -3.56
0.04 + 0.4y + y2 = -3.56

Factor a perfect square on the left side:
(y + 0.2)(y + 0.2) = -3.56

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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