GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
If (x - k)^2 = 9, what is the sum of the values of the solutions
[#permalink]
22 Feb 2022, 07:45
22 Feb 2022, 07:45
Expert Reply
00:00
Question Stats:
40% (00:55) correct
60% (00:39) wrong based on 10 sessions
Hide Show timer Statistics
If \((x - k)^2 = 9\), what is the sum of the values of the solutions for x?
(A) k + 9
(B) k - 9
(C) k + 3
(D) k - 3
(E) 2k
(A) k + 9
(B) k - 9
(C) k + 3
(D) k - 3
(E) 2k
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
If (x - k)^2 = 9, what is the sum of the values of the solutions
[#permalink]
22 Feb 2022, 08:07
22 Feb 2022, 08:07
1
Carcass wrote:
If \((x - k)^2 = 9\), what is the sum of the values of the solutions for x?
(A) k + 9
(B) k - 9
(C) k + 3
(D) k - 3
(E) 2k
(A) k + 9
(B) k - 9
(C) k + 3
(D) k - 3
(E) 2k
If something² = 9, then something = 3 (since 3² = 9), or something = -3 (since (-3)² = 9)
This means x - k = 3, which means x = 3 + k
Or it means x - k = -3, which means x = -3 + k
So, the sum of the possible x-values = (3 + k) + (-3 + k) = 2k
Answer: E
gmatclubot
If (x - k)^2 = 9, what is the sum of the values of the solutions [#permalink]
22 Feb 2022, 08:07
Moderators:
