Răspuns :
a= 75
b+c=32
a) a+b+c=75+32=107
b) 2a+2b+2c=2(a+b+c)=2×107=214
c)ab+ac=a(b+c)=75×32=2400
b+c=32
a) a+b+c=75+32=107
b) 2a+2b+2c=2(a+b+c)=2×107=214
c)ab+ac=a(b+c)=75×32=2400