Question

calcule me ajudem pfv​

Answer 1

Resposta:

a)

= 2x+3y-4z+8+x-y+2z-2

= 2x+x+3y-y-4z+2z+8-2

= 3x+2y-2z+6

b)

= 7xy+4x+8z-15-6x-10y+3

= 7xy+4x-6x+8z-15+3-10y

= 7xy-2x+8z-12-10y

c)

= x/3+x/2 +y+4y-z²-3z²

= 2x+3x/6 +5y - 4z²

= 5x/6+5y-4z²

d)

(1/5+xy-a²-7) - (2xy+7a²)

= 1/5+xy-a²-7-2xy+7a²

=-34/5 – xy -8a²

Explicação passo-a-passo: