Răspunsuri

2014-09-17T14:45:26+03:00
A) a+b+c = 25+14 = 39
b) a+3b+3c = a+3(b+c) = 14+3*25 = 14+75 = 89
c)5a+2c+2b = 70+2(c+b) = 70+50 = 120
d)ab+ac+5a-16b-16c = a(b+c)+70-16(b-c) = 350+70-16(b-c) /*(-1) = -350-70+16*25 =-20