If (a-5)(y+2) = 0 which of the following must be true? Options.
A) a = y	B) a > y	C) a < y	D) ay = -10	E) None of the above
From (a-5)(y+2) = 0 it follows that either a=5 or y=-2.   (A) a = y --&gt; not necessarily true. Consider a=5 and y=0.   (B) a &gt; y --&gt; not necessarily true. Consider a=5 and y=10.   (C) a &lt; y --&gt; not necessarily true. Consider a=5 and y=0.   (D) ay = -10 --&gt; not necessarily true. Consider a=5 and y=0.   Thus, none of the statements must be true.   Answer: None of the above.
<result>E</result>
If (a-5)(y+2) = 0 which of the following must be true?