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Absolute value (3 steps approach for complex problem) Pg 18

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Joined: 27 Feb 2017
Posts: 34
Location: Singapore
Absolute value (3 steps approach for complex problem) Pg 18  [#permalink]

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New post 17 Jan 2018, 02:05
Hi, could someone please advise how to decide where the negative sign should be placed for the 4 scenarios, whether it is before (x+3), (4-x), (8+x)?

Thanks,
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Re: Absolute value (3 steps approach for complex problem) Pg 18  [#permalink]

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New post 17 Jan 2018, 06:58
gy88 wrote:
Hi, could someone please advise how to decide where the negative sign should be placed for the 4 scenarios, whether it is before (x+3), (4-x), (8+x)?

Thanks,



put a value of x in that in each scenario and see if each is negative..
si if x<-8..
x-1 .. -8-1=-9, so negative sign
in (3-x) ... 3-(-8) = 11, so positive sign and so on

hope it clears the query
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Re: Absolute value (3 steps approach for complex problem) Pg 18 &nbs [#permalink] 17 Jan 2018, 06:58
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Absolute value (3 steps approach for complex problem) Pg 18

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