Question

(a-b) =3 and ab=5 then a3-b3=


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Answer 1

Given

♠a-b = 3

♠ab= 5

To Find

a³ - b³

Solution

Formula

a³-b³ = (a-b)³+3ab(a-b)

To Solve

$\implies {3}^{3} + 3(5(3))$

$\implies9 + 3(15)$

$\implies9 + 45$

Final Answer

$\implies54$