-3y(y-3)=12

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Solution for -3y(y-3)=12 equation:


Simplifying
-3y(y + -3) = 12

Reorder the terms:
-3y(-3 + y) = 12
(-3 * -3y + y * -3y) = 12
(9y + -3y2) = 12

Solving
9y + -3y2 = 12

Solving for variable 'y'.

Reorder the terms:
-12 + 9y + -3y2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 9y + -3y2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-4 + 3y + -1y2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-4 + 3y + -1y2)' equal to zero and attempt to solve: Simplifying -4 + 3y + -1y2 = 0 Solving -4 + 3y + -1y2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 4 + -3y + y2 = 0 Move the constant term to the right: Add '-4' to each side of the equation. 4 + -3y + -4 + y2 = 0 + -4 Reorder the terms: 4 + -4 + -3y + y2 = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -3y + y2 = 0 + -4 -3y + y2 = 0 + -4 Combine like terms: 0 + -4 = -4 -3y + y2 = -4 The y term is -3y. Take half its coefficient (-1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. -3y + 2.25 + y2 = -4 + 2.25 Reorder the terms: 2.25 + -3y + y2 = -4 + 2.25 Combine like terms: -4 + 2.25 = -1.75 2.25 + -3y + y2 = -1.75 Factor a perfect square on the left side: (y + -1.5)(y + -1.5) = -1.75 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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