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Mathematics 18 Online
OpenStudy (anonymous):

Solve 4y^3-36y=0

OpenStudy (watchmath):

\(4y(y^2-36)=0\) \(4y(y+6)(y-6)=0\) So \(y=0,-6,6\)

OpenStudy (watchmath):

Sorry a mistake ...

OpenStudy (watchmath):

\(4y(y^2-9)=0\) \(4y(y+3)(y-3)=0\) \(y=0,-3,3\)

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