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(x + 5)(x 5)
[#permalink]
19 May 2022, 01:31
19 May 2022, 01:31
Expert Reply
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Question Stats:
100% (00:47) correct
0% (00:00) wrong based on 8 sessions
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Quantity A |
Quantity B |
\([x + 5][x − 5] \) |
\(x^2 + 10x − 25 \) |
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
Part of the project: GRE QCQ & PS 3 Questions Every One DAILY Challenge - (2022)
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GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
Re: (x + 5)(x 5)
[#permalink]
19 May 2022, 02:15
19 May 2022, 02:15
1
Expand A
x^2 - 25
Perform Matching Operator step.
x^2 and -25 can get eliminated from both A and B.
Remaining term in A is zero and in B is 10x.
But x is not specified whether it is positive or negative. Hence, no relation between A and B is possible.
Thus, answer is D
Posted from my mobile device
x^2 - 25
Perform Matching Operator step.
x^2 and -25 can get eliminated from both A and B.
Remaining term in A is zero and in B is 10x.
But x is not specified whether it is positive or negative. Hence, no relation between A and B is possible.
Thus, answer is D
Posted from my mobile device
General Discussion
(x + 5)(x 5)
[#permalink]
20 May 2022, 02:51
20 May 2022, 02:51
1
Quantity A is the same as x^2-25
Therefore the only difference between Q-A and Q-2 is -10x which is the decisive factor.
If x is positive Q-A is greater and if x is negative Q-2 is greater.
Answer is (D)
Therefore the only difference between Q-A and Q-2 is -10x which is the decisive factor.
If x is positive Q-A is greater and if x is negative Q-2 is greater.
Answer is (D)
gmatclubot
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