(10y^2+8y+4)-(2y+y^2-12)=0

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Solution for (10y^2+8y+4)-(2y+y^2-12)=0 equation:


Simplifying
(10y2 + 8y + 4) + -1(2y + y2 + -12) = 0

Reorder the terms:
(4 + 8y + 10y2) + -1(2y + y2 + -12) = 0

Remove parenthesis around (4 + 8y + 10y2)
4 + 8y + 10y2 + -1(2y + y2 + -12) = 0

Reorder the terms:
4 + 8y + 10y2 + -1(-12 + 2y + y2) = 0
4 + 8y + 10y2 + (-12 * -1 + 2y * -1 + y2 * -1) = 0
4 + 8y + 10y2 + (12 + -2y + -1y2) = 0

Reorder the terms:
4 + 12 + 8y + -2y + 10y2 + -1y2 = 0

Combine like terms: 4 + 12 = 16
16 + 8y + -2y + 10y2 + -1y2 = 0

Combine like terms: 8y + -2y = 6y
16 + 6y + 10y2 + -1y2 = 0

Combine like terms: 10y2 + -1y2 = 9y2
16 + 6y + 9y2 = 0

Solving
16 + 6y + 9y2 = 0

Solving for variable 'y'.

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

Divide each side by '9'.
1.777777778 + 0.6666666667y + y2 = 0

Move the constant term to the right:

Add '-1.777777778' to each side of the equation.
1.777777778 + 0.6666666667y + -1.777777778 + y2 = 0 + -1.777777778

Reorder the terms:
1.777777778 + -1.777777778 + 0.6666666667y + y2 = 0 + -1.777777778

Combine like terms: 1.777777778 + -1.777777778 = 0.000000000
0.000000000 + 0.6666666667y + y2 = 0 + -1.777777778
0.6666666667y + y2 = 0 + -1.777777778

Combine like terms: 0 + -1.777777778 = -1.777777778
0.6666666667y + y2 = -1.777777778

The y term is 0.6666666667y.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667y + 0.1111111112 + y2 = -1.777777778 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667y + y2 = -1.777777778 + 0.1111111112

Combine like terms: -1.777777778 + 0.1111111112 = -1.6666666668
0.1111111112 + 0.6666666667y + y2 = -1.6666666668

Factor a perfect square on the left side:
(y + 0.3333333334)(y + 0.3333333334) = -1.6666666668

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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