Respuesta :

sqdancefan
The given result matches the description in the 4th selection.
carlosego
((x ^ 12) / (x ^ -3)) ^ 5
 By doing the correct simplification we have:
 ((x ^ 60) / (x ^ -15))
 (x ^ 75)
 Therefore the error is:
 answer:
 He divided the exponents instead of subtracting them.
 option 4

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