The value of `-7(a+b+c)-{-5(a+b+c)}` is

(a-5)^(2)+(b-c)^(2)+(c-d)^(2)+(b+c+d-9)^(2)=0, then the value of (a+b+c)(b+c+d) is :

If the value of (a + b - 3)^(2) + (b + c- 2)^(2) + (c + a - 5)^(2) = 0 , then the value of sqrt((b+c)^(a)+(c+a)^(b)) is :

If |a|=1,|b|=3 and |c|=5 , then the value of [a-b" "b-c" "c-a] is

If a=7, b=5, c=3, then the value of a^2+b^2+c^2-a b-b c-c a i s -12 (b) 0 (c) 8 (d) 12