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
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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