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{[(8+(63^2)]^(1/2) - [(8-(63^2)]^(1/2)}^(1/2)
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Updated on: 23 Aug 2021, 06:57
Updated on: 23 Aug 2021, 06:57
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Question Stats:
69% (01:17) correct
30% (01:49) wrong based on 33 sessions
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\(( \sqrt{8+\sqrt{63}}-\sqrt{8-\sqrt{63}})^2\)
(A) 14
(B) 14√2
(C) 16
(D) 16√2
(E) 18
Kudos for the right answer and explanation
Question part of the project GRE Quant/Math Extreme Challenge Daily (2021) Edition
GRE - Math Book
(A) 14
(B) 14√2
(C) 16
(D) 16√2
(E) 18
Kudos for the right answer and explanation
Question part of the project GRE Quant/Math Extreme Challenge Daily (2021) Edition
GRE - Math Book
Originally posted by Carcass on 23 Aug 2021, 04:51.
Last edited by GeminiHeat on 23 Aug 2021, 06:57, edited 1 time in total.
Last edited by GeminiHeat on 23 Aug 2021, 06:57, edited 1 time in total.
Please name the topic correctly
{[(8+(63^2)]^(1/2) - [(8-(63^2)]^(1/2)}^(1/2)
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23 Aug 2021, 19:46
23 Aug 2021, 19:46
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\(( \sqrt{8+\sqrt{63}}-\sqrt{8-\sqrt{63}})^2\)
\(8 + \sqrt{63} + 8 - \sqrt{63} - 2(\sqrt{8+\sqrt{63}})(\sqrt{8-\sqrt{63}})\)
\(16 - 2\sqrt{(64 - 63)}\)
\(16 - 2\)
\(14\)
Answer A
\(8 + \sqrt{63} + 8 - \sqrt{63} - 2(\sqrt{8+\sqrt{63}})(\sqrt{8-\sqrt{63}})\)
\(16 - 2\sqrt{(64 - 63)}\)
\(16 - 2\)
\(14\)
Answer A
General Discussion
Re: {[(8+(63^2)]^(1/2) - [(8-(63^2)]^(1/2)}^(1/2)
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23 Aug 2021, 13:56
23 Aug 2021, 13:56
can anyone give me detailed solution please?
thank you
thank you
