Question

(x+y+z) (xy+yz+zx)-xyz​

Answer 1

Answer:

$(x + y + z)(xy + yz + zx) - xyz \\ \\ {x}^{2}y + xyz + {x}^{2} z + {y}^{2} x + {y}^{2} z + xyz + zxy + {z}^{2} y + {z}^{2} x - xyz \\ \\ {x}^{2} (y + z) + {y}^{2} (x + z) + {z}^{2} (y + x) + 2xyz$