Question

Calcule o valor numérico da expressão 2-4x, quando:
A) x = 2
B) x = 1
C) x = 0
D) x = - 1

Answer 1

a) 2-4vezes2= 2-8 = 6
b) 2-4x1= 2-4 = 2
c) 2-4x0= 2-0= 2
d) 2-4x(-1)= 2-(-4)= 6

Answer 2

a) 2-4x
2-4.2
-6
b) 2-4x
2-4.1
-2
c)2-4x
2-4.0
2
d) 2-4x
2-4.(-1)
6