Question

$a - b = 3 \: and \: ab = 4 \: find \: {a }^{3} - {b }^{3}$
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Answer 1

Answer:

(a-b) ³=a³-b³-3ab(a-b)

put value,

3³=a³-b³-3×4×3

a³-b³=27+36=63

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