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# If y = 4 is a solution of the equation y2 + ay + 8 = 36, the

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If y = 4 is a solution of the equation y2 + ay + 8 = 36, the [#permalink]  29 Jan 2018, 15:11
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Question Stats:

90% (00:28) correct 9% (00:54) wrong based on 11 sessions
If y = 4 is a solution of the equation $$y^2 + ay + 8 = 36$$, then what is the value of a ?
A. −7
B. −4
C. −3
D. 3
E. 7

Drill 1
Question: 11
Page: 495
[Reveal] Spoiler: OA

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Re: If y = 4 is a solution of the equation y2 + ay + 8 = 36, the [#permalink]  30 Jan 2018, 08:01
sandy wrote:
If y = 4 is a solution of the equation $$y^2 + ay + 8 = 36$$, then what is the value of a ?
A. −7
B. −4
C. −3
D. 3
E. 7

Here put the value of a =4 in the above equation

i.e 16 + 4a + 8 =36

or a= 3
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Re: If y = 4 is a solution of the equation y2 + ay + 8 = 36, the [#permalink]  03 Feb 2018, 04:01
Thank you.
GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4856
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 102

Kudos [?]: 1742 [0], given: 397

Re: If y = 4 is a solution of the equation y2 + ay + 8 = 36, the [#permalink]  04 Mar 2018, 14:16
Expert's post
Explanation

Replace y with 4 to get 16 + 4a + 8 = 36. Then solve the equation to find that a equals 3.
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Re: If y = 4 is a solution of the equation y2 + ay + 8 = 36, the   [#permalink] 04 Mar 2018, 14:16
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