Question

a) f ( x ) = x + 2

b) f ( x ) = - x + 2

f) f ( x ) = 2x – 6

g) f ( x ) = x + 4

h) f(x) = 4

i) f(x) = 1 – 5x

l) f(x) = -3x + 6
me ajudem pfv

Answer 1

a) f ( x ) = x + 2

0 = x + 2

x = - 2

b) f ( x ) = - x + 2

- x + 2 = 0

- x = - 2 . (-1)

x = 2

f) f ( x ) = 2x – 6

2x - 6 = 0

2x = 6

x = 6/2

x = 3

g) f ( x ) = x + 4

x + 4 = 0

x = - 4

h) f(x) = 4

x = 4

i) f(x) = 1 – 5x

0 = 1 - 5x

- 1 = - 5x . (-1)

1 = 5x

x = 1/5

l) f(x) = -3x + 6

0 = - 3x + 6

- 3x + 6 = 0

-3x = - 6 .(-1)

3x = 6

x = 6/3

x = 2