Respuesta :

tramserran

Answer:  -3 and -21

Step-by-step explanation:

[tex](b+12)^{2}=81\\\\\sqrt{(b+12)^2}=\sqrt{81}\\ \\|b+12|=9\\\\b+12=\pm 9\\\\b+12=9\qquad and\qquad b+12=-9\\\\.\quad b=-3\qquad and\qquad \quad b=-21[/tex]

Answer:

-3 and -21

Step-by-step explanation:

it could go either way being -21 and -3. Also, I would explain it but I don't have the time.

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