n-7/n=-6

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Solution for n-7/n=-6 equation: 


D( n )

n = 0

n = 0

n = 0

n in (-oo:0) U (0:+oo)

n-(7/n) = -6 // + 6

n-(7/n)+6 = 0

n-7*n^-1+6 = 0

1*n^1-7*n^-1+6*n^0 = 0

(1*n^2+6*n^1-7*n^0)/(n^1) = 0 // * n^2

n^1*(1*n^2+6*n^1-7*n^0) = 0

n^1

n^2+6*n-7 = 0

n^2+6*n-7 = 0

DELTA = 6^2-(-7*1*4)

DELTA = 64

DELTA > 0

n = (64^(1/2)-6)/(1*2) or n = (-64^(1/2)-6)/(1*2)

n = 1 or n = -7

n in { -7, 1} 

n in { -7, 1 }

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