Question

a=b=c=919989 find the value of a³-b³-c³-3abc​

Answer 1

Answer:

${a}^{3} - {b}^{3} } - {c}^{3} - 3abc \\ if \: a = b \: {a}^{3} = {b}^{3} \\ answer \: is \: 0 - {c}^{3} - 3 {c}^{3} = - 4 {c}^{3} = - 4 \times {919989}^{3}$