Question

5. Encontre as raízes das funções reais:

a) y = 2x − 1

(c) y = 3x + 2

(e) y = −3x − 4

Answer 1

a)

y = 2x - 1

0 = 2x - 1

1 = 2x

1 / 2 = x

x = 1/2
---------------------

b)

y = 3x + 2

0 = 3x + 2

-2 = 3x

-2/3 = x

x = -2/3
------------------------

c)

y = - 3x - 4

0 = - 3x - 4

4 = - 3x

4 / -3 = x

x = 4/-3

x = -4/3