Respostas

2014-03-10T18:04:43-03:00
A) 2x+9-6x-2+2x -> -2x +7

B) 3a^2+3a+3+2a^2+4a+4-a^2-3a+3 -> 4a^2+4a+10 -> 2a^2+2a+5 -> resolver com báskara