Solve for y y^2-9y=0

Math
y2-9y=0
Factor y out of y2-9y.
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Factor y out of y2.
y⋅y-9y=0
Factor y out of -9y.
y⋅y+y⋅-9=0
Factor y out of y⋅y+y⋅-9.
y(y-9)=0
y(y-9)=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-9=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-9=0
Add 9 to both sides of the equation.
y=9
y=9
The final solution is all the values that make y(y-9)=0 true.
y=0,9
Solve for y y^2-9y=0

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