Question

simplifique as expressões ​

Answer 1

Resposta:

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

$b) \: (m + 2) \times (m - 2) + {(m + 2)}^{2} \\ {m}^{2} - 2m + 2m - 4 + {m}^{2} + 4m + 4 \\ 2 {m}^{2} + 4m$