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\(123456789^2 - 2\cdot123456789\cdot 123456787 + 123456787^2\)   the answer is not 0

 May 10, 2019

Best Answer 

 #1
avatar+8725 
+3

a2 - 2ab + b2   =   (a - b)2

 

So....

 

1234567892  -  2(123456789)(123456787)  +  1234567872   =   (123456789 - 123456787)2

 

And....

 

(123456789 - 123456787)2   =   ( 2 )2   =  4

 May 10, 2019
 #1
avatar+8725 
+3
Best Answer

a2 - 2ab + b2   =   (a - b)2

 

So....

 

1234567892  -  2(123456789)(123456787)  +  1234567872   =   (123456789 - 123456787)2

 

And....

 

(123456789 - 123456787)2   =   ( 2 )2   =  4

hectictar May 10, 2019

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