Respostas

2014-08-05T20:34:53-03:00
Olá Mell, 

a) (m -  ) ² =
 m² - 2.m.
 \frac{1}{2} +( \frac{1}{2} )^2
 m²-m+ \frac{1}{4}

b) ( - 1 ) ²
( \frac{a}{2})^2-2 .\frac{a}{2}.1  + 1^2 \\  \\  \frac{a^2}{4}-a+1

=)