Question

1. Resolva as multiplicações:
a) 8 (x + y) =
b) 13 (b - 2a) =
c) 13x (x + y) =
d) 4x (b2 + b) =
e) (x + 5) . (x + 2) =
f) (3x + 2) . (2x + 3) =
g) (x + 11) . ( x - 14) =
h) (2x - 3y) . (3x - y) =

2. Resolva as divisões:
i) (26x² - 22x) : (+2x) =
j) (6y³ + 9y²) : (3y2) =
k) (- 2x² - 6x) : (-2x) =
l) (42x³ - 18x4) : (+3x) =

quem roubar pontos vai ser denunciado :)

Answer 1

Resposta:

Resposta:a) 3(x+y)= 3x+3y

b) 7(x-2y)= 7x-14y

c) 2x(x+y)= 2x²+2xy

d) 4x (a+b)= 4ax+4bx

e) 2x(x²-2x+5)= 2x³-4x²+10x

f) (x+5).(x+2)= x²+2x+5x+10= x²+7x+10

g) (3x+2).(2x+1)= 6x²+3x+4x+2= 6x²+7x+2

h) (x+7).(x-4)= x²-4x+7x-28= x²-3x-28

i) (3x+4).(2x-1)= 6x²-3x+8x-4= 6x²+5x-4

j) (x-4y).(x-y)= x²-xy-4xy+4y²= x²-5xy+4y²

k) (5x-2).(2x-1)= 10x²-5x-4x+2= 10x²-9x+2

l) (3x+1).(3x-1)= 9x²-3x+3x-1= 9x²-1

m) (2x+5).(2x-5)=4x²-10x+10x-25= 10x²-25  

n) (6x²-4).(6x²+4)= 36x⁴+24x²-24x²-16= 36x⁴-16

o) (3x²-4x-3).(x+1)= 3x³+3x²-4x²-4x-3x-3= 3x³-x²-7x-3

q) (x-1).(x-2).(x-3)= x²-2x-x+2.(x-3)= x³-3x²-2x²+6x-x²+3x+2x-6= x³-6x²+11x-6

r) (x+2).(x-1).(x+3)= x²-x+2x-2.(x+3)= x³+3x²-x²-3x+2x²+6x-2x-6= x³+4x²+x-6

s) (x³-2).(x³+8)= x elevado a sexta potencia+8x³-2x³-16= x⁶+6x³-16

t) (x²+2).(x²+6)=x⁴+6x²+2x²+12= x⁴+8x²+12