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how to change the equation below into factored form f(x)=(x+14)^2-49

 Jan 29, 2019
 #1
avatar+111357 
+1

Let (x + 14) = a

Let 7 = b

 

So...we have

 

(x + 14)^2 - 7^2  =

 

a^2 - b^2  =

 

(a + b) ( a - b)   =

 

[ ( x + 14 ) + 7 ]  [ (x + 14) -  7 ]  =

 

[ x + 21 ] [ x + 7 ] 

 

 

cool cool cool

 Jan 29, 2019
edited by CPhill  Jan 29, 2019

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