Question

1)
Observe o exemplo e Calcule as adições:
(Agrupe e reduza os termos semelhantes)
a) (4x + 7) + (2x + 8) = 4x + 2x + 7 + 8 = 6x + 15
b) (-5x + 3y - 7) + (6x + 8y - 9) =
c) (3x2 - 8x - 1) + ( x2 + 3x + 1) =
d) (5x3 - 4x2 + 9x - 5) + (2x® + 2x2 - X + 7) =
e) (9x2 + 1) + (- 8x2 + 5x - 7)=
f) (5x2 - 4x + 2) + (6x2 - 3). ​

Answer 1

b) (-5x + 3y - 7) + (6x + 8y - 9) =

X + 11y - 16

c) (3x2 - 8x - 1) + ( x2 + 3x + 1) =

4x² - 5x

d) (5x3 - 4x2 + 9x - 5) + (2x® + 2x2 - X + 7) =

7x³ - 2x² + 8x + 2

e) (9x2 + 1) + (- 8x2 + 5x - 7)=

X² +5x -6

f) (5x2 - 4x + 2) + (6x2 - 3) =

11x² -4x -1