Question

04 - Determine o sinal do produto:

a) ( + ) . ( + ) =

b) ( + ) . ( – ) =

c) ( – ) . ( – ) =

d) ( – ) . ( + ) =​

Answer 1

Explicação passo-a-passo:

( + ) . ( + )

+

( + ) . ( – )

-

( – ) . ( – )

+

( – ) . ( + )

-