Solve using the Square Root Property y^2-4y=0

Math
y2-4y=0
Factor y out of y2-4y.
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Factor y out of y2.
y⋅y-4y=0
Factor y out of -4y.
y⋅y+y⋅-4=0
Factor y out of y⋅y+y⋅-4.
y(y-4)=0
y(y-4)=0
If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.
y=0
y-4=0
Set the first factor equal to 0.
y=0
Set the next factor equal to 0 and solve.
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Set the next factor equal to 0.
y-4=0
Add 4 to both sides of the equation.
y=4
y=4
The final solution is all the values that make y(y-4)=0 true.
y=0,4
Solve using the Square Root Property y^2-4y=0

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