Question

qual e o calculo(1-x)(x+1) ?

Answer 1

Resposta:

$x + 1 - {x}^{2} - x \\ 1 - {x}^{2} \\ \\ caso \: for \: igual \: a \: zero\\ 1 - {x}^{2} = 0 \\ 1 = {x}^{2} \\ x = \sqrt{1 } \\ x = 1$