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If 49 × 51 = x2 1, which of the following could be the value of x?
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24 May 2024, 00:15
24 May 2024, 00:15
Expert Reply
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Question Stats:
100% (00:49) correct
0% (00:00) wrong based on 15 sessions
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If \(49 × 51 = x^2 – 1\), which of the following could be the value of x?
A. 48
B. 50
C. 51
D. 53
E. 55
A. 48
B. 50
C. 51
D. 53
E. 55
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Free Materials for the GRE General Exam - Where to get it!!
Shorter GRE - Preparing for the Quantitative Reasoning Measure
Shorter GRE - Preparing for the Verbal Reasoning Measure
Re: If 49 × 51 = x2 1, which of the following could be the value of x?
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28 May 2024, 17:29
28 May 2024, 17:29
Can somebody explain why it is B and not A?
Thank you
Thank you
Re: If 49 × 51 = x2 1, which of the following could be the value of x?
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29 May 2024, 00:36
29 May 2024, 00:36
1
Expert Reply
\((50-1)(50+1)=50^2-1=x^2-1\)
\(x^2=50^2\)
\(x= \pm 50\)
B is the answer
More on this theory double product https://gre.myprepclub.com/forum/gre-ma ... 25882.html
\(x^2=50^2\)
\(x= \pm 50\)
B is the answer
More on this theory double product https://gre.myprepclub.com/forum/gre-ma ... 25882.html
