If x * y = xy - 2(x+y) for all integers x and y, then 2 * (-3) = ...
(A) -16
(B) -11
(C) -4
(D) 4
(E) 16
Friday, February 17, 2006
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1 comment:
We just have to compute the second member expression, with x=2 and y=-3. THus 2X(-3)-2[2+ (-3)] = -6 -2X[-1]=-6 + 2 = -4.
:. correct answer is (C)
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