Question

Quero ajuda neste problema: y.(y²-y-1)+y².(1-y)-y

Answer 1

Olá,

y·(y²-y-1)+y²·(1-y)-y =
y·(y²)+y·(-y)+y·(-1)+y²·(1)+y²·(-y)-y =
y³-y²-y+y²-y³-y =
y³-y³-y²+y²-y-y =
0+0-2y =
-2y

Resposta:

-2y