-36=n/2(15+n)

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Solution for -36=n/2(15+n) equation: 


n in (-oo:+oo)

-36 = (n/2)*(n+15) // - (n/2)*(n+15)

-((n/2)*(n+15))-36 = 0

-1*1/2*n*(n+15)-36 = 0

-1*1/2*n*(n+15)-36 = 0

-1/2*n^2-15/2*n-36 = 0

-1/2*n^2-15/2*n-36 = 0

-1*(1/2*n^2+15/2*n+36) = 0

1/2*n^2+15/2*n+36 = 0

DELTA = (15/2)^2-(1/2*4*36)

DELTA = -63/4

DELTA < 0

-1 = 0

-1 = 0

n belongs to the empty set

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