Question

which are the forst four identities?

Answer 1

Algebraic Identities

(a + b)(a - b) = a2 - b2

(a + b)2 = a2 + b2 + 2ac

(a - b)2 = a2 + b2 - 2ac

(a + b)3 = a3 + b3 + 3a2b + 3ab2

(a - b)3 = a3 - b3 - 3a2b + 3ab2

 

Answer 2

(a+b)2=a2+b2+2ab and (a-b)=a2+b2-2ab and