Question

Determine algebricamente os zeros das seguintes funções:
A)y=x-7
B)y=4+8x
C)y=3x-2
D)y=1/2x+5

Answer 1

A) y=x-7
0=x-7
x=7

B)y=4+8x
0=4+8x
8x=-4
x=4/8=1/2

C= y=3x-2
0=3x-2
3x=2
x=2/3

D)y=1/2x+5
0=1/2x+5
1/2x=-5
x=-5/(1/2)
x=-5.2
x=-10

Answer 2

a)x-7=0
x=0+7
x=7

b)4+8x=0
8x=0-4
8x=-4
x=-4/8
x=-0,5

c)3x-2=0
3x=0+2
3x=2
x=2/3

d)1/2x+5=0
x/2=0-5
x/2=-5
x=-5.2
x=-10