(6y^2-7y-3)-(2y^2-9y-7)=

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Solution for (6y^2-7y-3)-(2y^2-9y-7)= equation:


Simplifying
(6y2 + -7y + -3) + -1(2y2 + -9y + -7) = 0

Reorder the terms:
(-3 + -7y + 6y2) + -1(2y2 + -9y + -7) = 0

Remove parenthesis around (-3 + -7y + 6y2)
-3 + -7y + 6y2 + -1(2y2 + -9y + -7) = 0

Reorder the terms:
-3 + -7y + 6y2 + -1(-7 + -9y + 2y2) = 0
-3 + -7y + 6y2 + (-7 * -1 + -9y * -1 + 2y2 * -1) = 0
-3 + -7y + 6y2 + (7 + 9y + -2y2) = 0

Reorder the terms:
-3 + 7 + -7y + 9y + 6y2 + -2y2 = 0

Combine like terms: -3 + 7 = 4
4 + -7y + 9y + 6y2 + -2y2 = 0

Combine like terms: -7y + 9y = 2y
4 + 2y + 6y2 + -2y2 = 0

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

Solving
4 + 2y + 4y2 = 0

Solving for variable 'y'.

Factor out the Greatest Common Factor (GCF), '2'.
2(2 + y + 2y2) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(2 + y + 2y2)' equal to zero and attempt to solve: Simplifying 2 + y + 2y2 = 0 Solving 2 + y + 2y2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 1 + 0.5y + y2 = 0 Move the constant term to the right: Add '-1' to each side of the equation. 1 + 0.5y + -1 + y2 = 0 + -1 Reorder the terms: 1 + -1 + 0.5y + y2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 0.5y + y2 = 0 + -1 0.5y + y2 = 0 + -1 Combine like terms: 0 + -1 = -1 0.5y + y2 = -1 The y term is y. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.5y + 0.25 + y2 = -1 + 0.25 Reorder the terms: 0.25 + 0.5y + y2 = -1 + 0.25 Combine like terms: -1 + 0.25 = -0.75 0.25 + 0.5y + y2 = -0.75 Factor a perfect square on the left side: (y + 0.5)(y + 0.5) = -0.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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