math (did i do this right)
posted by keisha .
find the value of each of the following when a=2,b=1 and c=3
1)a(b+c)=2(1+3)=1
2)4b^22ac/a+b+c= 4(1)^22(2)(3)/2+1+3
ans=8/4=2

1. You substituted OK, but...
2(1+3)
=2(2)
=?
2. Again, the substitution is OK, but...
4((1)^2  2(2)(3)/2 + 1 + 3
=4(1)  12/2  1 + 3
=4  6  1 + 3
=?