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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2506
Given Kudos: 1055
GPA: 3.39
[2(2a^(1/2))^2=
[#permalink]
20 Mar 2020, 23:17
20 Mar 2020, 23:17
Expert Reply
00:00
Question Stats:
42% (00:07) correct
57% (00:21) wrong based on 7 sessions
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\((2\sqrt{2a})^2=\)
(A) \(4a\)
(B) \(4a^2\)
(C) \(8a\)
(D) \(8a^2\)
(E) \(6a\)
(A) \(4a\)
(B) \(4a^2\)
(C) \(8a\)
(D) \(8a^2\)
(E) \(6a\)
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: [2(2a^(1/2))^2=
[#permalink]
21 Mar 2020, 05:15
21 Mar 2020, 05:15
GeminiHeat wrote:
\((2\sqrt{2a})^2=\)
(A) \(4a\)
(B) \(4a^2\)
(C) \(8a\)
(D) \(8a^2\)
(E) \(6a\)
(A) \(4a\)
(B) \(4a^2\)
(C) \(8a\)
(D) \(8a^2\)
(E) \(6a\)
If \(k \geq 0\), then \((\sqrt{k})^2 =k\)
\((xy)^n = (x^n)(y^n)\)
Given: \((2\sqrt{2a})^2\)
Apply the above property to get: \((2^2)(\sqrt{2a})^2\)
Apply the other property to get: \((4)(2a)\)
Simplify to get: \(8a\)
Answer: C
Cheers,
Brent
gmatclubot
Re: [2(2a^(1/2))^2= [#permalink]
21 Mar 2020, 05:15
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