Ответ:

[tex](x + 3)(x - 1) + (2 - x)(2 + x) = x {}^{2} - x + 3x - 3 + 4 - x {}^{2} = 2x - 3 + 4 = 2x + 1 = 2 \times( - 0.5) + 1 = - 1 + 1 = 0[/tex]