Question

the value of 71 power 3 shortcut method

Answer 1

71cube = (70+1)cube
=343000+1+3*7*71
=354911

Answer 2

( 71 )³


=> ( 70 + 1 )³



$\mathbf{Formula : ( a + b ) ^{3} = {a}^{3} + b^{3} + 3ab( a + b ) } \\ \\ \\ \bold{applying \: \: \: formula \: }$




=> ( 70 )³ + ( 1 )³ + 3( 70 × 1 ) ( 70 + 1 )


=> 343000 + 1 + 210( 71 )

=> 343001 + 14910

=> 357911