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.
The equation (x - y)2 = x2 - y2 is true
[#permalink]
27 Dec 2021, 12:59
27 Dec 2021, 12:59
Expert Reply
00:00
Question Stats:
78% (01:14) correct
21% (00:49) wrong based on 14 sessions
Hide Show timer Statistics
The equation \((x - y)^2 = x^2 - y^2\) is true
(A) for all values of x and y
(B) only for x = 0 or y = 0
(C) only for y = 0 and x = 1
(D) only for y = 0 and x = y
(E) for no values of x and y
(A) for all values of x and y
(B) only for x = 0 or y = 0
(C) only for y = 0 and x = 1
(D) only for y = 0 and x = y
(E) for no values of x and y
Re: The equation (x - y)2 = x2 - y2 is true
[#permalink]
29 Dec 2021, 20:01
29 Dec 2021, 20:01
2
\((x - y)^2 = x^2 - y^2\)
\(x^2 - 2xy + y^2 = x^2 - y^2\)
\(2y^2 - 2xy = 0\)
\(2y ( y - x ) = 0\)
\(y = 0\) or \(y = x\) or both
Answer D
\(x^2 - 2xy + y^2 = x^2 - y^2\)
\(2y^2 - 2xy = 0\)
\(2y ( y - x ) = 0\)
\(y = 0\) or \(y = x\) or both
Answer D
Re: The equation (x - y)2 = x2 - y2 is true
[#permalink]
17 Oct 2024, 09:28
17 Oct 2024, 09:28
1
(B) only for x = 0 or y = 0
(D) only for y = 0 and x = y --> x=0
What is the difference between these option?
(D) only for y = 0 and x = y --> x=0
What is the difference between these option?
