3y^2+7y+15=0

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Solution for 3y^2+7y+15=0 equation:


Simplifying
3y2 + 7y + 15 = 0

Reorder the terms:
15 + 7y + 3y2 = 0

Solving
15 + 7y + 3y2 = 0

Solving for variable 'y'.

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

Divide each side by '3'.
5 + 2.333333333y + y2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + 2.333333333y + -5 + y2 = 0 + -5

Reorder the terms:
5 + -5 + 2.333333333y + y2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + 2.333333333y + y2 = 0 + -5
2.333333333y + y2 = 0 + -5

Combine like terms: 0 + -5 = -5
2.333333333y + y2 = -5

The y term is 2.333333333y.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333y + 1.361111112 + y2 = -5 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333y + y2 = -5 + 1.361111112

Combine like terms: -5 + 1.361111112 = -3.638888888
1.361111112 + 2.333333333y + y2 = -3.638888888

Factor a perfect square on the left side:
(y + 1.166666667)(y + 1.166666667) = -3.638888888

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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