Utilizando as regras dos produtos notáveis,calcule :?
a. (7a + 1 ) (7a - 1 ) =
b. (2 + 9x )² =
c. (6x - y )² =
d. (3x + 2/3a )² =
e. (a (eleva 4 ) + m (eleva 4) ) (a (eleva 4) - m (eleva 4) ) =
f. a³ + 6y²)² =
g. (m² + 2n³) ² =
h.(bc + 1/3a) ( bc - 1/3a ) =
i. (3ab + 1 ) ² =
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a)19a²-1
b)2+36a+81a²
c)36x²-12xy+y²
d)9x²+12ax/3+4a²/9
a. (7a + 1 ) (7a - 1 ) = 49a² - 1
e. http://www.wolframalpha.com/input/?i=%28a%5E4+%2B+...