Question

(x-2y) +(2x+2z-y)-(y+x-3z)
obtemos o polinômio:

a
x - y + z

b
x + 4y - 3z

c
2x - 4y + 5z

d
3x - 5y + 3z

e
2x - 5y + z

Answer 1

Explicação passo-a-passo:

$(x-2y)+(2x+2z-y)-(y+x-3z)=\\ \\ x-2y+2x+2z-y-y-x+3z=\\ \\\not x+2x-\not x-2y-y-y+2z+3z=\\ \\ 2x-4y+5z$

Letra C