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lsr · 2007 September 12th, 08:02 PM

Answer is E.

Krusta,
1^2=1 and (-1)^2 = 1.

For xy=0; x+y=1 or x+y=-1

2007 September 12th, 08:02 PM	#3 (permalink)
lsr TestMagic Guru-in-Training Join Date: Jan 2005 Location: Toronto Posts: 897	Answer is E. Krusta, 1^2=1 and (-1)^2 = 1. For xy=0; x+y=1 or x+y=-1