Question

(x-1)•(x^2+x+1)-(x+1)•(x^2 -x+1)=​

Answer 1

$(x - 1) \times (x {}^{2} + x + 1) - (x + 1) \times (x {}^{2} - x + 1) = {x}^{3} - 1 - ( {x}^{3} + 1) = {x}^{3} - 1 - {x}^{3} - 1 = - 2$