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Evaluate the following when a = 4 and b = 7 : (a + b)^2 - (a^2 + b^2) + (ab).

 May 10, 2021
 #1
avatar+55 
+1

are you looking for the answer because if so that equation would = 84

 May 10, 2021
 #2
avatar+121055 
+1

(a + b)^2  =  a^2  + 2ab + b^2

 

So

 

a^2 + 2ab  + b^2   -  ( a^2 + b^2)  +  (ab)   =

 

2ab +  ab  =

 

3ab  =

 

3 ^ 4 * 7   =

 

84

 

 

cool cool cool

 May 10, 2021

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