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Vincen
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For all numbers \(a\) and \(b,\) the operation \(@\) is defined by \(a@b = a^2 - ab.\) If \(xy \ne 0,\) then which of the following can be equal to zero?
I. \(x@y\)
II. \((xy)@y\)
III. \(x@(x + y)\)
A. II only
B. I and II only
C. I and III only
D. II and III only
E. All of the above
Answer: B
Source: Magoosh
I. \(x@y\)
II. \((xy)@y\)
III. \(x@(x + y)\)
A. II only
B. I and II only
C. I and III only
D. II and III only
E. All of the above
Answer: B
Source: Magoosh
