ralphy34 ralphy34

15-11-2018
Mathematics

contestada

[tex] | - 9 - 12| [/tex]

Respuesta :

15-11-2018

|a| = a if a ≥ 0

|a| = -a if a < 0

|-9 - 12| = |-21| = -(-21) = 21

Answer: |-9 - 12| = 21

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