Question

calculați: (x-1)(x+1)(x²+1)=?

Answer 1

$(x - 1)(x + 1) = {x}^{2} - 1 \\ ({x }^{2} - 1)( {x}^{2} + 1) = {x {}^{2} }^{2} - {1}^{2} = {x}^{4} \\ - 1$