Question

reduza o polinomio 4x2-[2x-(4x2-2x)]

Answer 1

4 x 2 -[2x -(4 x 2 - 2x) ] =

4 x 2 -[2x -(   8    - 2x) ] =

   8    -[2x -8 +2x ] =
  
   8 -2x +8 -2x =

   -2x -2x = -8 -8

   -4x = -16

      x = -16/-4
  
      x = +4

Answer 2

4x2-[2x-(4x2-2x)]

4x2-[2x-4x2+2x]

4x2-2x+4x2-2x

8x2-4x

4x(2x - 1)