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= (A + B)(A2 - AB + B2)
A4 - B4
= (A2 - B2)(A2 + B2)
= (A + B)(A - B)(A2 + B2)
faktor yang sama = (A + B)
jadi KPKnya itu
(A + B)(A - B)(A2 + B2)(A2 - AB + B2)
= (A4 - B4)(A2 - AB + B2)
= A6 - A5B + A4B2 - A2B4 + AB5 - B6
cmiiw