Question

1 ) Aplique as regras de produtos notáveis :
a) ( 7 - Y ) . ( 7 + Y ) =

b) ( X + 10 ) ² =

c) ( 3Y-9 ) ²

d) ( A + 8 ) . ( A - 8 ) =

e ) ( 2A + 6 ) ² =

Answer 1

Boa tarde

a) ( 7 - Y ) . ( 7 + Y ) = 49 - Y²

b) ( X + 10 ) ² = X² + 20X + 100 

c) ( 3Y-9 ) ² = 9Y² - 54Y + 81

d) ( A + 8 ) . ( A - 8 ) = A² - B²

e ) ( 2A + 6 ) ² = 4A²  + 24A + 36