Find the value of using the short-cut method:

Question:

Find the value of using the short-cut method:
(84)3

Solution:

$(84)^{3}$

Here, $a=8$ and $b=4$

Using the formula $a^{3}+3 a^{2} b+3 a b^{2}+b^{3}$.

$\therefore(84)^{3}=592704$

 

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