3.14r^2(12-r/3)

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Solution for 3.14r^2(12-r/3) equation: 


r in (-oo:+oo)

3.14*r^2*(12-(r/3)) = 0

3.14*r^2*(12-1/3*r) = 0

( 12-1/3*r )

12-1/3*r = 0 // - 12

-1/3*r = -12 // : -1/3

r = -12/(-1/3)

r = 36

( 3.14*r^2 )

3.14*r^2 = 0 // : 3.14

r^2 = 0

r = 0

r in { 36, 0 }

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