Question

If a =2 and b =3 , find the value of a^3 - b^3​

Answer 1

Answer:

=2^3-3^3

=4×3-9×3

=12-27

=-15

Answer 2

Answer:

$a = 2 \: and \: b = 3$

${a}^{3} - {b}^{3}$

$= (a - b)( {a}^{2} + {b}^{2} + ab)$

$= (2 - 3)[ {(2)}^{2} + {(3)}^{2} + (2)(3)]$

$= ( - 1)(4 + 9 + 6)$

$= ( - 1)(19)$

$= - 19$