Atividade:
1) Calcule os quocientes:
a) (15x6) : (3x2) =
b) (16x4) : (8x) =
c) (-30x5) : (+3x3) =
d) (+8x6) : (-2x4) =
e) (-10y5) : (-2y) =
f) (-35x7) : ( +5x3) =
g) (+15x8) : (-3x2) =
h) (-8x) : (-8x ) =
i) (-14x3) : (+2x2) =
j) (-10x3y) : (+5x2) =
k) (+6x2y) : (-2xy) =
l) (-7abc) : (-ab) =
m) (15x7) : ( 6x5) =
n) (20a3b2) : ( 15ab2) =
o) (+3x3) : (-1x2) =
p) (-4x5y) : ( -4x3y) =
q) (-2xy2) : ( xy) =
Soluções para a tarefa
a)
(+ 5x) . (+ 4x) = 20x²
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
(- n) . (+ 6n) = - 6n²
***********************************
c)
(-2y) . (5y) = - 10y²
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d)
(2y) . (- 7x) = - 14xy
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
e)
(- 2x) . (- 3y) = 6xy
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
f)
(- 3xy) . (- 2y) = 6xy²
- 3 . (-2) = 6
xy.y = xy²
*******************************
g)
(15x⁶) : (3x²) = 5x⁴
6 - 4 2
x = x
15x⁶
-------- = 5x⁴
3x²
****************************
h)
(16x⁴) : (8x ) = 2x³
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
i)
(- 30x⁵) : (+3x³) = - 10x²
- 30/3 = - 10
x⁵ / x³ = x²
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
j)
(+8x⁶) : (- 2x⁴) = - 4x²
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
l)
(-10y⁵) : (-2y) = 5y⁴
- 10/ (-2) = + 5
y⁵/y = y⁴
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
m)
(-35x⁷) : (+5x³) = - 7x⁴
-35/5 = - 7
7 - 3 4
x = x
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
n)
(+15x⁸) : (-3x²) = - 5x⁶
15 / (-3) = - 5
8 - 2 6
x = x
***********************************
o)
(8x) : (-8x) = - 1
8x 1
----- = ----- = - 1
- 8x - 1
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
p)
(-14x³) : (+2x²) = - 7x
- 14/2 = - 7
= x³ / x²
3 - 2
x = x
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
q)
(-10x³y) : (+5x²) = - 2xy
- 10/5 = - 2
x³/x² = x