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ab = 0?

This topic has 1 expert reply and 1 member reply

ab = 0?

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ab = 0?

(1) a + b + ab = 0
(2) a - b = 0

Can some experts find the best Option in this?

OA E

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lheiannie07 wrote:
ab = 0?

(1) a + b + ab = 0
(2) a - b = 0

Can some experts find the best Option in this?

OA E
Statement 1 - Case 1: a = 0 and b = 0. YES ab = 0
Case 2: a = -2 and b = -2. NO ab is not 0.
Not sufficient.

Statement 2: If a- b =0, then a = b. Notice that we can reuse both cases from statement 1, giving us a YES and a NO, both for statement 2 and together. Not sufficient.

The answer is E

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DavidG@VeritasPrep wrote:
lheiannie07 wrote:
ab = 0?

(1) a + b + ab = 0
(2) a - b = 0

Can some experts find the best Option in this?

OA E
Statement 1 - Case 1: a = 0 and b = 0. YES ab = 0
Case 2: a = -2 and b = -2. NO ab is not 0.
Not sufficient.

Statement 2: If a- b =0, then a = b. Notice that we can reuse both cases from statement 1, giving us a YES and a NO, both for statement 2 and together. Not sufficient.

The answer is E
Thanks a lot!

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