Question

Determine a raiz ou zero de cada funcao:
A) f (x) =3x+15
B) f (x) = -4x+12
C) f (x) 5x-7
D) f (x)=-5x

Answer 1

a)

3x + 15 = 0
3x = -15
x = -15/3
x = -5

b)

-4x + 12 = 0
-4x = -12
x = 12/4
x = 3

c)

5x - 7 = 0
5x = 7
x = 7/5

d)

-5x = 0
x = 0