(7y^2-4y+2)+(-3y^2+6y+5)=

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Solution for (7y^2-4y+2)+(-3y^2+6y+5)= equation:


Simplifying
(7y2 + -4y + 2) + (-3y2 + 6y + 5) = 0

Reorder the terms:
(2 + -4y + 7y2) + (-3y2 + 6y + 5) = 0

Remove parenthesis around (2 + -4y + 7y2)
2 + -4y + 7y2 + (-3y2 + 6y + 5) = 0

Reorder the terms:
2 + -4y + 7y2 + (5 + 6y + -3y2) = 0

Remove parenthesis around (5 + 6y + -3y2)
2 + -4y + 7y2 + 5 + 6y + -3y2 = 0

Reorder the terms:
2 + 5 + -4y + 6y + 7y2 + -3y2 = 0

Combine like terms: 2 + 5 = 7
7 + -4y + 6y + 7y2 + -3y2 = 0

Combine like terms: -4y + 6y = 2y
7 + 2y + 7y2 + -3y2 = 0

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

Solving
7 + 2y + 4y2 = 0

Solving for variable 'y'.

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

Divide each side by '4'.
1.75 + 0.5y + y2 = 0

Move the constant term to the right:

Add '-1.75' to each side of the equation.
1.75 + 0.5y + -1.75 + y2 = 0 + -1.75

Reorder the terms:
1.75 + -1.75 + 0.5y + y2 = 0 + -1.75

Combine like terms: 1.75 + -1.75 = 0.00
0.00 + 0.5y + y2 = 0 + -1.75
0.5y + y2 = 0 + -1.75

Combine like terms: 0 + -1.75 = -1.75
0.5y + y2 = -1.75

The y term is 0.5y.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5y + 0.0625 + y2 = -1.75 + 0.0625

Reorder the terms:
0.0625 + 0.5y + y2 = -1.75 + 0.0625

Combine like terms: -1.75 + 0.0625 = -1.6875
0.0625 + 0.5y + y2 = -1.6875

Factor a perfect square on the left side:
(y + 0.25)(y + 0.25) = -1.6875

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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