A = 3B = 5
___________
2 ( 3A + B) =
2 (9 + 5) =
2 (14) =
28
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LCM(a2b5, a3b3) The LCM of both numbers HAS to have the largest coefficient of both variables. For a, it's a3, and for b it is b5. So the LCM is a3b5.
a5+b5 = (a+b) (a4-a3b+a2b2-ab3+b4)
54
a3+b3=(a+b)3-3a2b-3ab2
a3+b3