Respostas

2014-02-08T14:30:43-02:00
Olá
(5x-4)2 quadrado da diferença

(5x-4).(5x-4)
    25X²-20X-20X +16
25X²-40X +16

  


2014-02-08T14:31:33-02:00
resolver equaçao (5x-4)2
(5x - 4 ) (5x -4)
25x² -20x -20x -16=0
25x² -40x -16=0