1.

Factorise a¹²-b¹²

Answer» a12 - b12USE FORMULA a2 - b2 = ( a+b) ( a-b)= (a6 + b6) ( a6 - b6)= ( a6 + b6) ( a3 + b3) ( a3 - b3)USE FORMULAS a3 + b3 = ( a+b) ( a2 -ab + b2)AND a3 - b3 = ( a-b) ( a2 + ab + b2)(a2 + b2) ( a4 -a2b2 + b4) ( a+ b) (a2 -ab+b2) ( a-b) (a2 +ab + b2)
Use this identities (a-b)(a+b)


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