Question

9. Calcule a soma e subtração dos monômios e polinômios a seguir:
a) 3s + 12s - 7s =
b) 12ab + 15ab - 18ab =
c) 15x - 8y + 10y - 14x =
d) 16abc - 17abc + abc =
e) 4x - 5y + 8xy - 10y + 12x - 6xy =
f) 3ab + 12ac - 5bc + 8ac-3ab + 6bc =
g) 4x - 8y +12z =
h) 34e - 18 ef - 4eg +21eg - Zef - 34e =

ajudem eu pfvr ಥ‿ಥ​

Answer 1

a) 3s + 12s - 7s = 8s

b) 12ab + 15ab - 18ab = 9ab

c) 15x - 8y + 10y - 14x

= 15x - 14x + 10y - 8y

= x + 2y

d) 16abc - 17abc + abc

= 16abc - 16abc

= 0

e) 4x - 5y + 8xy - 10y + 12x - 6xy

= 8xy - 6xy + 4x + 12x - 10y - 5y

= 2xy + 16x - 15y

f) 3ab + 12ac - 5bc + 8ac - 3ab + 6bc

= 3ab - 3ab + 12ac + 8ac + 6bc - 5bc

= 20ac + bc

g) 4x - 8y + 12z = 4x - 8y + 12z

h) 34e - 18 ef - 4eg + 21eg - 7ef - 34e

= 34e - 34e - 18ef - 7ef + 21eg - 4eg

= - 25ef + 17eg