Question

9)O valor da expressão numérica - 42 + (3-5).(-2) + 32 - (-2)4 é:
a) 7
b) 8
C) 15
d) -7​

Answer 1

Resposta:

− 42 + (3−5)(−2) + 32 − (−2)(4)

= − 42 + (−2)(−2)+32 − (−2)(4)

= − 42 + 4 + 32 − (−2)(4)

= − 38 + 32 − (−2)(4)

= − 6 − (−2)(4)

= − 6 − (−8)

= 2