Question

Pvf me ajudem preciso terminar meu dever
A)(+3xy)-(-xy)+(xy)
B)(+15x)-(-3x)-(+7x)+(-2x)
C)(-9y)-(+3y)-(+y)+(-2y)
D)(3n)+(-8n)+(+4n)-(-5n)-(-n)
me ajudem pfv

Answer 1

Olá,

Vamos lá,

A)(+3xy)-(-xy)+(xy)
= 3xy + xy + xy
= 5xy


B)(+15x)-(-3x)-(+7x)+(-2x)
= 15x + 3x - 7x - 2x
= 18x - 9 x
= 9x


C)(-9y)-(+3y)-(+y)+(-2y)
= -9y -3y - y - 2y
= -15y


D)(3n)+(-8n)+(+4n)-(-5n)-(-n)
= 3n -8n +4n + 5n + n
= 5n