Question

me ajuda
a (-9).(+12).(-2)
b (-7)-(-10).(-5)
c(-7).(-7).(-1).(-5)
d(-20).(-2).(+6).(+4).(-1)

Answer 1

Olá!

Resposta:

( - 9 ) × ( + 12 ) × ( - 2 )

- 108 × ( - 2 )

+ 216

( - 7 ) - ( - 10 ) × ( - 5 )

( - 7 ) - 50

- 57

( - 7 ) × ( - 7 ) × ( - 1 ) × ( - 5 )

+ 49 × + 5

+ 245

( - 20 ) × ( - 2 ) × ( + 6 ) × ( + 4 ) × ( - 1 )

+ 40 × + 24 × ( - 1 )

960 × ( - 1 )

- 960

Explicação passo-a-passo:

Basta aplicar essa seguinte regra :

( + ) ( + ) = +

( - ) ( - ) = +

( + ) ( - ) = -

( - ) ( + ) = -

Answer 2

Explicação passo-a-passo:

a) 216

b) -57

c) 245

d) -960

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