If a²+b²+c² = 2(a – b – c) – 3 then the value of 4a – 3b + 5c is 

If x²+y²+z² = xy + yz + zx, then the value of is

If average of two x and (where x ≠ 0) is A, what will be the average of x³ and ?

If a=x+y, b=x-y, c=x+2y, then is

If then the value of

Solve the following equation.