Hi,

Solve the equation 

log2(-x)+log2(x+12)=5

log2(-x(x+12))=5

 2^5 = -x(x+12)

 x^2 + 12x + 32 = 0

(x + 8)(x+4) = 0

 x = -8   0r  x = -4

and

log2(8)+log2(4)= 3 + 2 = 5

log2(4)+log2(8)= 2 + 3 = 5 

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