21n2-3n/30n

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Solution for 21n2-3n/30n equation: 


n in (-oo:+oo)

21*n^2-(((3*n)/30)*n) = 0

21*n^2+(-1/10)*n^2 = 0

209/10*n^2 = 0 // : 209/10

n^2 = 0

n = 0

n = 0

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