If the lines ax + by + c=0,bx+cy+a=0 and cx+ay+b=0 be concurrent then

A.a^3+b^3+c^3-3abc=0 B. a^3+b^3+c^3-abc

C.a^3+b^3+c^3+3abc. D.none of these

Sir pls explain the answer in detail.

Thanks and regards,

Jai

Solve the equations .
It is in 2 variables. So use any 2 equations to get the value of x and y.

Put in the 3^rdeqn to get the result which is option A
.........................................................................................................................................