Question

If p +q+r = 0 prove that p cube + q cube + r cube = 3pqr using this find the value of (-12)cube + (7)cube + (5)cube

Answer 1

Answer:

-1260

Step-by-step explanation:

-12+7+5=0

that implies a+b+c=0

therefore, (-12)cube + (7)cube + (5)cube

                =3×-12×7×5

                  =(-1260)