Question

resolva por fatoração
a) x • ( x + 1 ) = 0

b) 2x • ( x - 5 ) = 0

c) ( X + 3 ) • ( x - 1 ) = 0

d) ( x - 6) • ( 4x - 8) = 0

Answer 1

a) x (x+1) = 0
    x' = 0
    x'' = -1
   S = { 0, -1}

c) 2x (x-5) = 0
     2x = 0
     x' = 0 : 2 ∴ x' = 0
     x'' = 5
     S = {0,5}

c) (x+3) (x-1) = 0
     x + 3 = 0
     x' = -3

     x -1 = 0
     x'' = 1 

   S = {-3,1}

d) (x - 6) (4x - 8) = 0
     x - 6 = 0
     x' = 6

     4x - 8 = 0
     4x = 8
     x'' = 8 : 4 ∴ x'' = 2
S = { 6,2}