Question

(1+×)•(1-×)+(×+2)-2•(×+2)=​

Answer 1

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