Question

find the value of 7³-5³​

Answer 1

Answer:-

$\underline\color{purple}\boxed{7³-5³=218}$

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Explanation:-

$\large\implies$ $\large{7³-5³}$

$\large\implies$ $\large{7³-5³=343-125}$

$\large\implies$ $\large\underline\color{yellow}\boxed{7³-5³=218}$

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Alternative:-

$\large\implies$ $7³-5³$ = $(7-5)³+3(7×5)(7-5)$

$\large\implies$ $7³-5³$ = $(2)³+3(35)(2)$

$\large\implies$ $7³-5³$ = $8+210$

$\large\implies$ $\underline\color{green}\boxed{7³-5³=218}$

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$\color{red}\boxed{Formula \: used}$

$\large\implies$ $\color{blue}\boxed{a³-b³=(a-b)³+3ab(a-b)}$