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Is a^2 > 4a - 3b?

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Is a^2 > 4a - 3b?  [#permalink]

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New post Updated on: 05 Sep 2014, 19:13
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A
B
C
D
E

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  55% (hard)

Question Stats:

59% (01:37) correct 41% (01:51) wrong based on 123 sessions

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Is a^2 > 4a - 3b?

(1) b > 0 and a > 4
(2) 4a – 3b = −1

Originally posted by CharlieSollers on 05 Sep 2014, 18:54.
Last edited by Bunuel on 05 Sep 2014, 19:13, edited 1 time in total.
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Re: Is a^2 > 4a - 3b?  [#permalink]

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New post 05 Sep 2014, 19:16
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Re: Is a^2 > 4a - 3b?  [#permalink]

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New post 19 Apr 2018, 07:29
+1 for option D.

Is a^2>4a-3b ?

St 1 -> b>0 & a>4 ;
a^2-4a = a(a-4) --> This is greater than zero. -3b is also greater than zero as b>0. Hence sufficient

St 2 -> 4a-3b = -1 ; a^2 is positive and has to be greater than zero. Hence sufficient

Option D.
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Re: Is a^2 > 4a - 3b?  [#permalink]

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New post 26 Nov 2019, 11:59
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Re: Is a^2 > 4a - 3b?   [#permalink] 26 Nov 2019, 11:59
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