Respostas

2013-06-12T19:33:46-03:00

(x+7)(x=5)= x² +12x +35

(y-6)(y+5)=  y² - y - 30

2 5 2
2013-06-12T20:47:38-03:00

(x + 7) (x + 5) = x² + 12x + 35

 

(y - 6 )  (y + 5) = y² + 5y - 6y - 30 = y² - y - 30