Given a + B = 5, A-B = 3, find the value of the algebraic formula A & sup3; b-2a & sup2; B & sup2; + AB & sup3

a³b-2a²b²+ab³=ab(a²-2ab+b²)
=ab(a-b)²
=9ab
=9[(a+b)²-(a-b)²]/4
=9x(25-9)/4=36

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