# Absolute value [Pending...]

**mansoor** 25 Jun 2017, 06:26

### My question

If x = -|w|, which of the following MUST be true

A. x=-w

B. x=w

C. x^2=w

D. x^2=w^2

E. x^3=w^3

Why option (a) is not the correct answer? the question clearly says x=-|w|

which means

|w|=-x

and by definition, w=-x

regards

### Relevant page

If x = -|w|, which of the following must be true : GMAT Problem Solving (PS)

### What I've done so far

x=-|w|

=> |w|=-x

=> w=-x

or

w^2=x^2

i am stuck between A or D

X

If x = -|w|, which of the following MUST be true
A. x=-w
B. x=w
C. x^2=w
D. x^2=w^2
E. x^3=w^3
Why option (a) is not the correct answer? the question clearly says x=-|w|
which means
|w|=-x
and by definition, w=-x
regards

Relevant page
<a href="https://gmatclub.com/forum/if-x-w-which-of-the-following-must-be-true-218960.html">If x = -|w|, which of the following must be true : GMAT Problem Solving (PS) </a>
What I've done so far
x=-|w|
=> |w|=-x
=> w=-x
or
w^2=x^2
i am stuck between A or D

## Re: Absolute value

**philp** 04 Oct 2017, 10:54

i also think te correct anwser sould be A-(x=-w)

X

i also think te correct anwser sould be A-(x=-w)

## Re: Absolute value

**Murray** 08 Oct 2017, 04:04

@Mansoor: Sorry - I must have missed your question when it first came in.

With this kind of question, proceed as follows. Try some actual examples.

(i) w is positive

Try w = 3.

Which ones of a, b, c, d are correct?

(ii) w is negative

Try w = -5

Which ones of a, b, c, d are correct?

What's your conclusion?

X

@Mansoor: Sorry - I must have missed your question when it first came in.
With this kind of question, proceed as follows. Try some actual examples.
(i) w is positive
Try w = 3.
Which ones of a, b, c, d are correct?
(ii) w is negative
Try w = -5
Which ones of a, b, c, d are correct?
What's your conclusion?

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