Question

1) Calcule os monômios abaixo:
a) ( +3xy ) – ( -xy) + ( xy) =
b) ( +15x) – ( -3x) – ( + 7x) + ( -2x) =
c) ( -9y) – ( + 3y) – ( +y) + ( -2y)
d) ( 3a ) + ( -8 a ) + (4 a) – ( -5 a) – ( -a) =

Answer 1

a) 5xy
b) 9x
c) -15y
d) -3a