Question

Determine algébricamente os zeros da função:
A)y=x-7
B)y=4-8x
C)y=3x-2

Answer 1

a) x-7=0
x=7

b)-8x+4=0
x=-4/-8  (÷4)
x=1/2

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

Answer 2

A)y=x-7 ==> x - 7 = 0 ==> x = 7

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

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