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15-11-2021
Mathematics

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surjithayer10otahza surjithayer10otahza

15-11-2021

Answer:

Step-by-step explanation:

|x|=x,if x>0

|x|=-x,if x<0

(a)

|7-9|=|-2|=-(-2)=2

(b)

|7|-9=7-9=-2

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