Respuesta :

Answer:

n= -4, 3

Step-by-step explain

n^2 + n = 12

n^2 + n - 12 = 0

n^2 + 4n - 3n - 12 = 0

n(n+4) -3(n+4) = 0

(n-3) (n+4) = 0

n-3 = 0 = n=3

n+4 = 0 = n=-4

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