<PRE><B>Question 828130</B>
look at some consecutive odd numbers
5 7 9 11
they are two a part 
so we let x be the first and x+2 be the second
x*(x+2)=143
x^2+2x-143=0
what are factors of -143? 
-11 and +13
and 
+11 and -13
we need them to add up to +2

(x-11)*(x+13)=0
x=11 y=13 or x=-13 y=-11
remember their products must be +143
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