Respuestas

2012-09-30T18:54:42+02:00
2012-09-30T18:56:03+02:00

a) (-7+12)*2-4[15:3-9+2*(3-1)] = (-5)*2-4[5-9+2*(2)]=-10-4[-4+4]=-10-4[0]=-10-0=-10

 

b) 3*6+12:2-3(6)+4*[3+2*(4-7)] = 18+6-18+4*[3+2*(-3)]=

24-18+4*[3+ -6]=6+4*[-3]=6-12=-6