Question

a) (2x +6)• (-3x + 12) > 0 =

b) ( x + 5) • (-2x + 1 ) > 0 =

c) ( x - 2 )
________ > 0 =
( 2x + 5 ) -

d) ( -x -1 )
________ < 0 =
( 2x + 5 ) - ​

Answer 1

Resposta:

a) x ∈ {-3, 4}

b) x ∈  {-5, 1/2}

c) x ∈ {-infinito, -5/2} U {2, +infinito}

d) x ∈  {- infinito, -5/2} U {-1, +infinito}