1/2n^2-n-210

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Solution for 1/2n^2-n-210 equation: 


n in (-oo:+oo)

(1/2)*n^2-n-210 = 0

1/2*n^2-n-210 = 0

DELTA = (-1)^2-(-210*1/2*4)

DELTA = 421

DELTA > 0

n = (421^(1/2)+1)/(1/2*2) or n = (1-421^(1/2))/(1/2*2)

n = 421^(1/2)+1 or n = 1-421^(1/2)

n in { 1-421^(1/2), 421^(1/2)+1 }

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