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The equation (x - y)2 = x2 - y2 is true
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27 Dec 2021, 12:59
27 Dec 2021, 12:59
Expert Reply
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Question Stats:
76% (01:16) correct
23% (00:49) wrong based on 13 sessions
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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
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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
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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?
