Question

if (x+y)z equal 1then z is a multiplicative inverse of​

Answer 1

Answer:

X+y=-1

Cubing on both sides

So

(X+y)³=-1³

X³+y³+3xy(x+y)=-1

X³+y³+3xy(-1)=-1

X³+y³-3xy=(-1)

X³+y³-3xy=-1

Step-by-step explanation: