9y^2-18y-12=6y

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Solution for 9y^2-18y-12=6y equation:


Simplifying
9y2 + -18y + -12 = 6y

Reorder the terms:
-12 + -18y + 9y2 = 6y

Solving
-12 + -18y + 9y2 = 6y

Solving for variable 'y'.

Reorder the terms:
-12 + -18y + -6y + 9y2 = 6y + -6y

Combine like terms: -18y + -6y = -24y
-12 + -24y + 9y2 = 6y + -6y

Combine like terms: 6y + -6y = 0
-12 + -24y + 9y2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-4 + -8y + 3y2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-4 + -8y + 3y2)' equal to zero and attempt to solve: Simplifying -4 + -8y + 3y2 = 0 Solving -4 + -8y + 3y2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -1.333333333 + -2.666666667y + y2 = 0 Move the constant term to the right: Add '1.333333333' to each side of the equation. -1.333333333 + -2.666666667y + 1.333333333 + y2 = 0 + 1.333333333 Reorder the terms: -1.333333333 + 1.333333333 + -2.666666667y + y2 = 0 + 1.333333333 Combine like terms: -1.333333333 + 1.333333333 = 0.000000000 0.000000000 + -2.666666667y + y2 = 0 + 1.333333333 -2.666666667y + y2 = 0 + 1.333333333 Combine like terms: 0 + 1.333333333 = 1.333333333 -2.666666667y + y2 = 1.333333333 The y term is -2.666666667y. Take half its coefficient (-1.333333334). Square it (1.777777780) and add it to both sides. Add '1.777777780' to each side of the equation. -2.666666667y + 1.777777780 + y2 = 1.333333333 + 1.777777780 Reorder the terms: 1.777777780 + -2.666666667y + y2 = 1.333333333 + 1.777777780 Combine like terms: 1.333333333 + 1.777777780 = 3.111111113 1.777777780 + -2.666666667y + y2 = 3.111111113 Factor a perfect square on the left side: (y + -1.333333334)(y + -1.333333334) = 3.111111113 Calculate the square root of the right side: 1.763834208 Break this problem into two subproblems by setting (y + -1.333333334) equal to 1.763834208 and -1.763834208.

Subproblem 1

y + -1.333333334 = 1.763834208 Simplifying y + -1.333333334 = 1.763834208 Reorder the terms: -1.333333334 + y = 1.763834208 Solving -1.333333334 + y = 1.763834208 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + y = 1.763834208 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + y = 1.763834208 + 1.333333334 y = 1.763834208 + 1.333333334 Combine like terms: 1.763834208 + 1.333333334 = 3.097167542 y = 3.097167542 Simplifying y = 3.097167542

Subproblem 2

y + -1.333333334 = -1.763834208 Simplifying y + -1.333333334 = -1.763834208 Reorder the terms: -1.333333334 + y = -1.763834208 Solving -1.333333334 + y = -1.763834208 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '1.333333334' to each side of the equation. -1.333333334 + 1.333333334 + y = -1.763834208 + 1.333333334 Combine like terms: -1.333333334 + 1.333333334 = 0.000000000 0.000000000 + y = -1.763834208 + 1.333333334 y = -1.763834208 + 1.333333334 Combine like terms: -1.763834208 + 1.333333334 = -0.430500874 y = -0.430500874 Simplifying y = -0.430500874

Solution

The solution to the problem is based on the solutions from the subproblems. y = {3.097167542, -0.430500874}

Solution

y = {3.097167542, -0.430500874}

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