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The following quadratic expression is factorable.

 

x^2 + bx + 19

 

If b is an integer, what are all the possible values of b?

 

______ and ______

 Dec 10, 2016

Best Answer 

 #1
avatar+36916 
+10

My understanding is this      what two numbers multiplied together = 19  (  prime number with only the factors    1  and  19   or  -1 and -19)     and ADDED together = b

Which means   b  =    20    (from 19 + 1)  or  -20  (from -19 and - 1)

 Dec 10, 2016
 #1
avatar+36916 
+10
Best Answer

My understanding is this      what two numbers multiplied together = 19  (  prime number with only the factors    1  and  19   or  -1 and -19)     and ADDED together = b

Which means   b  =    20    (from 19 + 1)  or  -20  (from -19 and - 1)

ElectricPavlov Dec 10, 2016
 #2
avatar+73 
-4

THANKS!

GAMEMASTERX40  Dec 10, 2016

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