Question

4) Determine o zero das funções afim.
a) y = 4x + 8
B) y = -4x + 16
C) y = 7x + 21
D) y = -6x + 18
E) y = 44 - 22x
F) y = 3x - 18
G) y = 14 - 7x
H) y = 4x - 36​

Answer 1

A) y = 4x + 8
4x + 8 = 0
4x = -8
x = -8/4
x = -2

B) y = -4x + 16
-4x + 16 = 0
-4x = -16 .(-1)
4x = 16
x = 16/4
x = 4

C) y = 7x + 21
7x + 21 = 0
7x = -21
x = -21/7
x = -3

D) y = -6x + 18
-6x + 18 = 0
-6x = -18.(-1)
6x = 18
x = 18/6
x = 3

E) y = 44 - 22x
44 - 22x = 0
-22x = -44.(-1)
22x = 44
x = 44/22
x = 2

F) y = 3x - 18
3x - 18 = 0
3x = 18
x = 18/3
x = 6

G) y = 14 - 7x
14 - 7x = 0
-7x = -14.(-1)
7x = 14
x = 14/7
x = 2

H) y = 4x - 36
4x - 36 = 0
4x = 36
x = 36/4
x = 9