Question

solve it and send me now plz​

Answer 1

Answer:

Step-by-step explanation:

a³-b³=(a-b)(a²+ab+b²)

let (x+1) be a       and   (x-1) be  b

so,

(x+1)³-(x-1)³

((x+1)-(x-1))((x+1)²+(x+1)(x-1)+(x-1)²

(x+1-x+1)((x²+1+2x)+(x²-1)+(x²+1-2x)

(2)(x²+1+2x+x²-1+x²+1-2x)

2(3x²+1)

6x²+2