Question

determine os zeros das funções do primeiro grau:

y=x+9
y=2x-3
y=-4x+6
y=-2x-8
y= 3x+15
y=2x-18​

Answer 1

y=x+9

x+9=0

x = -9

y=2x-3

2x-3 = 0

2x = 3

x = 3/2

y=-4x+6

-4x+6=0

x = 6/4

y=-2x-8

-2x-8 = 0

-2x = 8

x = 8/-2

x = -4

y= 3x+15

3x+15 = 0

3x = -15

x = -15/3

x = -5

y=2x-18

2x -18 = 0

2x = 18

x = 18/2

x = 9