Question

Calcule o valor numérico da expressão 2-4x.quando:
a)x=2
b)x=1
c)x=0
d)x=-1
e)x=-2
f)x=10
g)x=-20
h)x=-6
i)x=12
j)x=8

Answer 1

Boa tarde

f(x) = 2 - 4x

a)x=2, f(2) = 2 - 8 = -6
b)x=1, f(1) = 2 - 4 = -2
c)x=0, f(0) = 2
d)x=-1, f(-1) = 2 + 4 = 6
e)x=-2, f(-2) = 2 + 8 = 10
f)x=10, f(10) = 2 - 40 = -38
g)x=-20, f(20) = 2 - 80 = -78
h)x=-6, f(-6) = 2 + 24 = 26 
i)x=12, f(12) = 2 - 48 = -46
j)x=8, f(8) = 2 - 32 = -30