Question

if a,b,c belongs to N
(a-b-c)^3 =?? ​

Answer 1

Step-by-step explanation:

${(a - b - c)}^{3} \\ = [(a - b) -c]^{3} \\ =(a - b)^{3} - 3 \times {(a - b)}^{2} \times c + 3 \times (a - b) \times {c}^{2} - {c}^{3} \\ = {a}^{3} - 3 {a}^{2} b + 3a {b}^{2} - {b}^{3} - 3c( {a}^{2} - 2ab + {b}^{2} ) + 3a {c}^{2} - 3b {c}^{2} - {c}^{3} \\ = {a}^{3} - 3 {a}^{2} b + 3a {b}^{2} - {b}^{3} - 3 {a}^{2} c + 6abc - 3 {b}^{2} c + 3a {c}^{2} - 3b {c}^{2} - {c}^{3}$

hope it helps uh ♦️♦️♦️

follow me and mark as brainliest. ❤❤❤