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The expression x^2-k^2 where k is a constant is equivalent to the expression (x+a)(x-b) where a and b are constants. What is the value of a-b 

 Apr 12, 2018
edited by Guest  Apr 12, 2018
edited by Guest  Apr 12, 2018
 #1
avatar+100571 
+2

x^2  - k^2   =  (x + a) (x - b)

 

(x + k) ( x - k)  =  (x + a) ( x - b)

 

So   a  =   k     and   b  = k

 

So

 

a - b   =  k - k   =    0

 

 

cool cool cool

 Apr 12, 2018
 #2
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+1

Thank you so much! I actually managed to work this out before your reply and realized I was just overthinking it!

Guest Apr 12, 2018
 #3
avatar+100571 
+1

OK....good job  !!!

 

 

cool cool cool

CPhill  Apr 12, 2018

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