Question

(1+x) (1-x)-(1+x)²,como resolver

Answer 1

( 1 + x ) ( 1 - x ) - ( 1 + x )²

( 1² - x + x - x² ) - ( 1 + x ) ( 1 + x )

( 1 - x² ) - ( 1 + x + x + x² )

1 - x² - 1 - 2 x - x²

- 2 x - 2 x²