Respostas

2013-10-08T16:20:51-03:00
A)=a) x4 + 3x² ----------------     =   x²(x²  +  3)    =     x² + 3                    (x²  +  3)     b) x² - 4x +4 ----------------      = (x – 2)²          =      x² -5x +6          (x +2)(x + 3 )