Question

If a+b=6 and ab=7,find the value of a³+b³

Answer 1

Step-by-step explanation:

$( {a}^{3} + {b}^{3} ) = (a + b)^{3} - 3ab(a + b)$

or,

$( {a}^{3} + {b}^{3} ) = {6}^{3} - (3 \times 7 \times 6) = 90$

Answer 2

Step-by-step explanation:

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