1-Quando x = 71-(-2).(-27) e y = -35+(+8).(-7) qual é o valor de x-y?

2-O dobro de -8 e o quadrado de -8 são respectivamente:

a)16,16
b)16,-64
c)-16,64
d)-16,-64
e)-8,-16

3-A fatoração completa de 1176 é:

a)2². 3². 7
b)2³. 3². 7
c)2³. 3 . 7²
d)2³. 3 . 7
e) 2². 3 . 7³
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