4y^2-12y+9-y^2=9

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Solution for 4y^2-12y+9-y^2=9 equation:


Simplifying
4y2 + -12y + 9 + -1y2 = 9

Reorder the terms:
9 + -12y + 4y2 + -1y2 = 9

Combine like terms: 4y2 + -1y2 = 3y2
9 + -12y + 3y2 = 9

Add '-9' to each side of the equation.
9 + -12y + -9 + 3y2 = 9 + -9

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

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

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

Solving
-12y + 3y2 = 0

Solving for variable 'y'.

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

Ignore the factor 3.

Subproblem 1

Set the factor 'y' equal to zero and attempt to solve: Simplifying y = 0 Solving y = 0 Move all terms containing y to the left, all other terms to the right. Simplifying y = 0

Subproblem 2

Set the factor '(-4 + y)' equal to zero and attempt to solve: Simplifying -4 + y = 0 Solving -4 + y = 0 Move all terms containing y to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + y = 0 + 4 Combine like terms: -4 + 4 = 0 0 + y = 0 + 4 y = 0 + 4 Combine like terms: 0 + 4 = 4 y = 4 Simplifying y = 4

Solution

y = {0, 4}

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