Verified answer

Explicação passo-a-passo:

a)

5 (-2)²+12(-2)-5

5.4-24-5

20-24-5

-4-5

-9

b)

5(5)²+12.5-5

30+60-5

90-5

85

C)

5(1/2)²+12(1/2)-5

5.(1/4) + 6 - 5

5/4 + 6 - 5

5/4 + 1

(5+1)/4

6/4

3/2

d)

5(-3)²+12.(-3)-5

5.9-36-5

45-36-5

45-41

4