Question

3. Să se calculeze c = -7· (-5 + 8) - (-8 + 12)· (-5) - 9 ​

Answer 1

Salut! =)

-7 × ( - 5 + 8 ) - ( -8 + 12 ) × ( - 5 ) - 9

-7 × 3 - 4 × ( - 5 ) - 9

-21 - ( - 20 ) - 9

-21 + 20 - 9

-1 - 9

= - 10

Bafta! =)

Answer 2

c= -7×(-5+8)-(-8+12)×(-5)-9

c= -7×3-4×(-5)-9

c= -21+20-9

c= -1-9

c= -10