In ΔABC if b + c-3a = 0, then find cor(를j.col) 2 2

If a^2+b^2+c^2-a b-b c-c a=0, then find the relation between a,b and c

If the sides of a triangle are b - 3a + 2c , a + 3b - 3c and 2a - b + c , then find its perimeter .

If A = [{:(2, -3), (4, 1):}], B = [{:(2, 3), (5, 0):}]" and " C = [{:(-1, 2),(0, 5):}] then find A(B + C).

If a^2+b^2+c^2+ab+bc+ca<=0 AA a, b, c in R then find the value of the determinant |[(a+b+2)^2, a^2+b^2, 1] , [1, (b+c+2)^2, b^2+c^2] , [c^2+a^2, 1, (c+a+2)^2]| : (A) abc(a^2 + b^2 +c^2) (B) 0 (C) a^3+b^3+c^3 + 3abc (D) 65

If A=[[1,2],[3,4]] and B=[[2,3],[4,5]] , then find A+B-C=0 , then find C.

When a=3 , b=0 , c=-2 , find the value of : 1/2a^4 + 2/3b^2c^2 - 1/9a^2c^2 +c^3 .

If A=[1 1-1 2 0 3 3-1 2] , B=[1 0-1""""""3 2 4] and C=[1 2 3-4 2 0-2 1] , find A(BC), (AB)C and show that (A B)C" "=" "A(B C) .