Respostas

2013-11-13T14:39:21-02:00
a) (x + 3)2 = (x^2 + 9)   
b) (a + b)2 = (a^2 + b^2
c) (5y – 1)2 = (25y - 1)
d) (x2  – 6)2 = (x^4 - 36)
e) (2x + 7)2 = (4x + 49)
f) (9x + 1) . (9x – 1) = 
(9x – 1)^2
g) (a2 – xy)2 = (a^4 – xy^2)
h) 2 y 6 1 = 122y