If `(a-1)^2+(b+2)^2+(c+1)^2=0` then `2a-3b+7c` is

If (a-1)^(2)+(b+2)^(2)+(c+1)^(2)=0 then the value of 2a-3b+7c is

If (3a+1)^(2) +(b-1)^(2) +(2c-3)^(2)=0 , then value of (3a+b+2c) is

If a and b are roots of x^2 -p(x+1)-c =0 then (1+a) (1+b) and (a^2 + 2a+1)/(a^2 + 2a+c) + (b^2 +2b +1)/(b^2 + 2b +c) are,

If a,b,c are sides of a triangle and |(a^(2),b^(2),c^(2)),((a+1)^(2),(b+1)^(2),(c+1)^(2)),((a-1)^(2),(b-1)^(2),(c-1)^(2))|=0 then

If a, b, c are sides of a triangle and |(a^2,b^2,c^2),((a+1)^2,(b+1)^2,(c+1)^2),((a-1)^2,(b-1)^2,(c-1)^2)|=0 then

If a+b+c=0 and a^2+b^2+c^2=1, then (a) a b+b c+c a=1/2 (b) a b+b c+c a=-1/2 (c) a^4+b^4+c^4=1/2 (d) a^4+b^4+c^4=3/2

If 4a^2+b^2+2c^2+4a b-6a c-3b c=0, then the family of lines a x+b y+c=0 may be concurrent at point(s) (-1,-1/2) (b) (-1,-1) (-2,-1) (d) (-1,2)