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(5+a)(3+a)
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18 Jul 2018, 16:46
18 Jul 2018, 16:46
Expert Reply
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Question Stats:
60% (00:52) correct
39% (00:37) wrong based on 157 sessions
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Quantity A |
Quantity B |
\((5+a)(3+a)\) |
\(a^2 + 2a + 15\) |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Kudos for R.A.E
Re: (5+a)(3+a)
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18 Jul 2018, 20:11
18 Jul 2018, 20:11
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Carcass wrote:
Quantity A |
Quantity B |
\((5+a)(3+a)\) |
\(a^2 + 2a + 15\) |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Kudos for R.A.E
\((5+a)(3+a) = a^2 + 8a + 15\)
Comparing both quantities
QTY A = \(a^2 + 8a + 15\)
QTY B = \(a^2 + 2a + 15\)
\({a^2 + 15}\) is common in both the quantities and so we can cancel them .
Now QTY A = \(8a\)
QTY B = \(2a\)
But it cannot be proved which QTY will be greater, because if
a is positive then QTY A > QTY B
if a is negative then QTY A < QTY B
therefore option D
Re: (5+a)(3+a)
[#permalink]
13 Oct 2024, 04:41
13 Oct 2024, 04:41
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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