1) Efetue:a) +7x -3x =b) -8x+11x =

1) Efetue:

a) +7x -3x =
b) -8x+11x =
c) (-2y) + (-3y) =
d) -2m -m =
e) 5a2-3a2 =
f) 5x - 5x =
g) 6x - 4x =
h) -6n + n =
i) 8x – 3x =
j) -5x – 11x =
k) -6y – y =
l) 7y – 7y =
m) -3x – 4x =
n) -6x – x=
o) 2y – 5y =
p) -m –m =
2) Calcule:
a) (+5x) . (-4x2) =
b) (-2x) . (+3x) =
c) (+5x) . (+4x) =
d) (-n) . (+ 6n) =
e) (-6x2) . (+3x2) =
f) (-2y) . (5y) =
g) (+4x2) . (+5x3) =
h) (2y) . (-7x) =
i) (-2x) . (-3y) =
j) (+3x) . (-5y) =
k) (-3xy) . (-2x) =