Question

desenvolva as expressões

Answer 1

a)$(a/2+3)^2=a^2/2+3a/2+3a/2+9=$
$=a^2/2+6a/2+9$
b)$(3x-1/6)^2=9x^2-3x/6-3x/6+1/36=$
$=9x^2-6x/6+1/36=9x^2-x+1/36$
c)$(1+x/3).(1-x/3)=1-x/3+x/3-x^2/9=$
$=1-x^2/9$
d)$(m/2+5/3).(m/2-5/3)=m^2/4-5m/6+5m/6-25/9=$
$m^2/4-25/9$