Question

Calcule o que se pede.

a) A : B, em que:

A = (– 7 – 4) . (– 9 + 2) – (– 72 + 13 )

B = (– 5 – 5) + (– 9 – 4 + 6)
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b) ( A – B)2, em que:

A = (– 50) : (– 5 – 5 ) . (– 5)

B = [(– 8) : (+2) – 7 – (– 1)] .

Answer 1

Resposta:

ITEM A) – 8

ITEM B) – 30

Explicação passo-a-passo:

ITEM A

A = (– 7 – 4) . (– 9 + 2) – (– 72 + 13 )

A = ( – 11 ) . ( – 7 ) – ( –59 )

A = 77 + 59

A = 136

B = (– 5 – 5) + (– 9 – 4 + 6)

B = ( – 10 ) + ( – 7 )

B = ( – 10 ) – 7

B = – 17

A : B

136 : ( – 17 )

( – 8 )

ITEM B

A = (– 50) : (– 5 – 5 ) . (– 5)

A = ( – 50 ) : ( – 10 ) . ( – 5 )

A = 5 . ( – 5 )

A = – 25

B = [(– 8) : (+2) – 7 – (– 1)]

B = [ – 4 – 7 – (– 1)]

B = [ – 11 – (– 1)]

B = [ – 11 + 1 ]

B = – 10

( A – B )2

(( – 25 ) – ( – 10 ))2

(( – 25 ) + 10 )2

– 15 × 2

–30