(y^2+5y+4)+(7y^2+2y+3)=

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Solution for (y^2+5y+4)+(7y^2+2y+3)= equation:


Simplifying
(y2 + 5y + 4) + (7y2 + 2y + 3) = 0

Reorder the terms:
(4 + 5y + y2) + (7y2 + 2y + 3) = 0

Remove parenthesis around (4 + 5y + y2)
4 + 5y + y2 + (7y2 + 2y + 3) = 0

Reorder the terms:
4 + 5y + y2 + (3 + 2y + 7y2) = 0

Remove parenthesis around (3 + 2y + 7y2)
4 + 5y + y2 + 3 + 2y + 7y2 = 0

Reorder the terms:
4 + 3 + 5y + 2y + y2 + 7y2 = 0

Combine like terms: 4 + 3 = 7
7 + 5y + 2y + y2 + 7y2 = 0

Combine like terms: 5y + 2y = 7y
7 + 7y + y2 + 7y2 = 0

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

Solving
7 + 7y + 8y2 = 0

Solving for variable 'y'.

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

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

Move the constant term to the right:

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

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

Combine like terms: 0.875 + -0.875 = 0.000
0.000 + 0.875y + y2 = 0 + -0.875
0.875y + y2 = 0 + -0.875

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

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 = -0.875 + 0.19140625

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

Combine like terms: -0.875 + 0.19140625 = -0.68359375
0.19140625 + 0.875y + y2 = -0.68359375

Factor a perfect square on the left side:
(y + 0.4375)(y + 0.4375) = -0.68359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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