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(sqrt3+sqrt2)(sqrt3-sqrt2)
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30 Jan 2024, 02:23
30 Jan 2024, 02:23
Expert Reply
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Question Stats:
100% (00:30) correct
0% (00:00) wrong based on 3 sessions
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\((\sqrt{3}+\sqrt{2})(\sqrt{3}-\sqrt{2})(\sqrt{7}-\sqrt{5})(\sqrt{7}+\sqrt{5})\)
A. 1
B. 2
C. 3
D. 4
E. 5
A. 1
B. 2
C. 3
D. 4
E. 5
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Free Materials for the GRE General Exam - Where to get it!!
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
Re: (sqrt3+sqrt2)(sqrt3-sqrt2)
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31 Jan 2024, 09:17
31 Jan 2024, 09:17
1
The answer is B.
Using (a + b)(a - b) = a^2 - b^2 , we get that:
(√3 + √2)(√3 − √2) * (√7 − √5)(√7 + √5)
= (3 - 2) * (7 - 5)
= 1 * 2
= 2
Using (a + b)(a - b) = a^2 - b^2 , we get that:
(√3 + √2)(√3 − √2) * (√7 − √5)(√7 + √5)
= (3 - 2) * (7 - 5)
= 1 * 2
= 2
gmatclubot
Re: (sqrt3+sqrt2)(sqrt3-sqrt2) [#permalink]
31 Jan 2024, 09:17
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