SOLUTION: If x^2 −3x − 21 = y and x^2 − 4x −18 = y , what is the product of (x − 5)(x − 7)(x + 2)(x + 3) in terms of y?

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Question 252554: If x^2 −3x − 21 = y and x^2 − 4x −18 = y , what is the product of
(x − 5)(x − 7)(x + 2)(x + 3) in terms of y?
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
and , what is the product of
in terms of y? 

Since  and , then

, since both equal 

simplifying:





So therefore





So you're asking how to write 240 in terms of -21?

One way would be 

Somehow I think you're wanting something else, but I 
don't know what else.  Did you mistype something?

Edwin
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