Question

determine a raiz ou zero das funcoes ?


a)y=2x+12
b)y=2x+16
c)y=8x+64

Answer 1

a)y=2x+12
   2x+12=0
   2x=-12
   x= -12/2
   x=-6

b)y=2x+16
   2x+16=0
   x=-16/2
   x=-8

c)y=8x+64
   8x+64=0
   x=-64/8
   x=-8

Espero ter lhe ajudado ;)

Answer 2

a)
y = 2x + 12
0 = 2x + 12
- 12 = 2x
2x = - 12
x = - 12/2
x = - 6

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
y = 2x + 16
0 = 2x + 16
- 16 = 2x
2x = - 16
x = -16/2
x = - 8
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c)
y = 8x + 64
0 = 8x + 64
- 64 = 8x
8x = - 64
x = - 64/8
x = - 8

d) 
y = 5.x -120
0 = 5x - 120
120 = 5x
5x = 120
x = 120/5
x = 24

e)
y = 7x - 49
0 = 7x - 49
49 = 7x
7x = 49
x = 49/7
x = 7 

G)
y= - 3x + 99
0 = - 3x + 99
3x = 99
x = 99/3
x = 33

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
h)
y = 14x - 328
0 = 14x - 328
328 = 14x
14x = 328
x = 328  (:2)      164
     -------        = -------- 
       14   (:2)         7