Jorge Raúl Moncayo Zabala
b
a
b
aa
a
b
b
(a + b)2 = a2 + ab + ab + b2
(a + b)2 = a2 + 2ab + b2
a
a
b
b a - b
a - b (a – b)2
b2
(a - b)2 = a2 - [b2 + (ab – b2) + (ab – b2) ]
(a - b)2 = a2 – [2ab – b2]
(a – b2) = a2 – 2ab + b2
ab – b2
a
a - b
b
a + b
a - b
a2 – b2 = (a + b) (a – b)
x
x
bb
a
xx2 ax
bx ab
(x + a) (x + b) = x2 + ax + bx + ab
(x + a) (x + b) = x2 + (a + b)x + ab
a
b
3 3 2 2 3( ) 3 3a b a a b ab b
32233 33 babbaaba