Question

If x=ab, y=bc, z=ac prove that xyz= x+y+z+2

Answer 1

Answer:

xyz=x+y+z+2

ab×bc×ac =ab+bc+ac+2

(ab×bc×ac)-2 =ab +bc+ac

-2ab-2bc-2ac=ab+bc+ac

-2(ab+bc+ac)=ab+bc+ac

-2=0

therefore 0=0

and lhs =rhs

proved