=y^2-4y

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Solution for =y^2-4y equation:


Simplifying
0 = y2 + -4y

Reorder the terms:
0 = -4y + y2

Solving
0 = -4y + y2

Solving for variable 'y'.
Remove the zero:
4y + -1y2 = -4y + y2 + 4y + -1y2

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

Combine like terms: -4y + 4y = 0
4y + -1y2 = 0 + y2 + -1y2
4y + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
4y + -1y2 = 0

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

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 + -1y)' equal to zero and attempt to solve: Simplifying 4 + -1y = 0 Solving 4 + -1y = 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 + -1y = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1y = 0 + -4 -1y = 0 + -4 Combine like terms: 0 + -4 = -4 -1y = -4 Divide each side by '-1'. y = 4 Simplifying y = 4

Solution

y = {0, 4}

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