It is currently 20 Oct 2017, 15:10

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# if (x-5)(y+2) = 0, which of the following must be true?

Author Message
Intern
Joined: 31 Jul 2003
Posts: 9

Kudos [?]: 13 [0], given: 0

Location: CT
if (x-5)(y+2) = 0, which of the following must be true?  [#permalink]

### Show Tags

17 Jan 2004, 23:05
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:01) correct 0% (00:00) wrong based on 2 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

if (x-5)(y+2) = 0, which of the following must be true?

a. x=y
b. x>y
c. x<y
d. xy=-10
e. none of the above

Kudos [?]: 13 [0], given: 0

Manager
Joined: 26 Dec 2003
Posts: 227

Kudos [?]: 3 [0], given: 0

Location: India

### Show Tags

18 Jan 2004, 00:08
B? X>Y if x=5 or if y= -2 the euation will be 0 so x has to be greater than y

Kudos [?]: 3 [0], given: 0

Intern
Joined: 01 Dec 2003
Posts: 35

Kudos [?]: [0], given: 0

Location: infront of my LCD

### Show Tags

18 Jan 2004, 00:31
E?

(x-5)(y+2) = 0

if x = 5, y can be anything and it will be zero
if y = -2, x can be anything and it will be zero

Kudos [?]: [0], given: 0

Intern
Joined: 05 Dec 2003
Posts: 47

Kudos [?]: [0], given: 0

Location: LA

### Show Tags

19 Jan 2004, 20:17
I agree with calnhob's answer and approach. In questions like these, I never go for the obvious which is setting x = 5 and y = -2. There's always a trick, unless it's the first question in the test.

My approach. First, identify what they are testing you. In an equation like this when is it equal to 0. When either set of ( ) is equal to 0 or when x=5 and y =-2. Then using that information, you move on.

I have learned through practice, never to dive into the question. First ask yourself, what is the GMAT testing, then write down either the formula or the rule. I'm not an expert in math, but it works for me.

Kudos [?]: [0], given: 0

Intern
Joined: 20 Jan 2004
Posts: 19

Kudos [?]: [0], given: 0

Location: KZ

### Show Tags

20 Jan 2004, 08:48
I also vote for E.

The calnhob way of thinking is the most appropriate here.

Kudos [?]: [0], given: 0

20 Jan 2004, 08:48
Display posts from previous: Sort by