Question

Daca a=3, b+c=7 si x+y=10,calculati; a+4b+4c si ax+ay+ab+ac

Answer 1

a+4(b+c)=3+4×7=31
a(x+y)+a(b+c)=3×10+3×7=51

Answer 2

a+4b+4c =a+4(b+c)=3+4*7=3+28=31

ax+ay+ab+ac=a(x+y+b+c)=3(10+7)=3*17=51