Reduza os monômios semelhantes
a) (-3x)+(-8x)
b) (-12y)+(+6y)
c) (+5ab) - (-7ab)
d) -12a+9a+5a
e) 15y-10y-6y
f) 4a²-10a²-6a²-4a²
g) 3/4ax + 1/3ax - 1/2ax
h) 1/4y² - 5/8y² - 1/2y²
i) -a/2 + a/3 - a/5
j) (-2/5ab) + (3/10ab)
k) (-2ax) - (-3/5ax)
l) (-5/8bc) - (-3/4bc)
Soluções para a tarefa
Respondido por
3
a)
= (-3x)+(-8x)
= - 3x - 8x
= - 11x
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
= (-12y)+(+6y)
= - 12y + 6y
= - 6y
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c)
= (+5ab) - (-7ab)
= 5ab + 7ab
= 12ab
********************************
d)
= -12a+9a+5a
= - 12a + 14a
= 2a
***************************
e)
= 15y-10y-6y
= 15y - 16y
= - y
************************
f)
= 4a²-10a²-6a²-4a²
= 4a² - 20a²
= - 16a²
**************************
g)
= 3/4ax + 1/3ax - 1/2ax
[ 3 + 1 - 1 ] ax (9 + 4 - 6).ax (13 - 6).ax 7 ax
---- ----- ---- = --------------- = --------- = ----
[ 4 3 2 ] 12 12 12
***************************************
h)
= 1/4y² - 5/8y² - 1/2y²
[ 1 - 5 - 1 ].y² [2 - 5 - 4].y² (2 - 9).y² - 7 y²
---- --- ---- = ---------------- = -------- = -----
[ 4 8 2 ] 8 8 8
****************************
i)
= -a/2 + a/3 - a/5
- 1 a + 1 a - 1 a
----- ------ -----
2 3 5
- 15a + 10a - 6a - 21a + 10a - 11a
------------------------- = ------------------- = ---------
30 30 30
**********************************************************
j)
= (-2/5ab) + (3/10ab)
= - 2 ab + 3 ab
--------- -----
5 10
2.(-2)ab + 3 ab - 4ab + 3ab
= --------------------- = -----------------
10 10
= - 1 ab
------
10
****************************
k)
= (-2ax) - (-3/5ax)
- 2 ax + 3 ax
-----
5
- 10 ax + 3 ax - 7 ax
---------------------- = ----------
5 5
***********************************
l)
= (-5/8bc) - (-3/4bc)
[- 5 + 3 ] . bc
----- -----
[ 8 4 ]
- 5 + 6 bc = 1 bc
----------- ---
8 8
= (-3x)+(-8x)
= - 3x - 8x
= - 11x
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
= (-12y)+(+6y)
= - 12y + 6y
= - 6y
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
c)
= (+5ab) - (-7ab)
= 5ab + 7ab
= 12ab
********************************
d)
= -12a+9a+5a
= - 12a + 14a
= 2a
***************************
e)
= 15y-10y-6y
= 15y - 16y
= - y
************************
f)
= 4a²-10a²-6a²-4a²
= 4a² - 20a²
= - 16a²
**************************
g)
= 3/4ax + 1/3ax - 1/2ax
[ 3 + 1 - 1 ] ax (9 + 4 - 6).ax (13 - 6).ax 7 ax
---- ----- ---- = --------------- = --------- = ----
[ 4 3 2 ] 12 12 12
***************************************
h)
= 1/4y² - 5/8y² - 1/2y²
[ 1 - 5 - 1 ].y² [2 - 5 - 4].y² (2 - 9).y² - 7 y²
---- --- ---- = ---------------- = -------- = -----
[ 4 8 2 ] 8 8 8
****************************
i)
= -a/2 + a/3 - a/5
- 1 a + 1 a - 1 a
----- ------ -----
2 3 5
- 15a + 10a - 6a - 21a + 10a - 11a
------------------------- = ------------------- = ---------
30 30 30
**********************************************************
j)
= (-2/5ab) + (3/10ab)
= - 2 ab + 3 ab
--------- -----
5 10
2.(-2)ab + 3 ab - 4ab + 3ab
= --------------------- = -----------------
10 10
= - 1 ab
------
10
****************************
k)
= (-2ax) - (-3/5ax)
- 2 ax + 3 ax
-----
5
- 10 ax + 3 ax - 7 ax
---------------------- = ----------
5 5
***********************************
l)
= (-5/8bc) - (-3/4bc)
[- 5 + 3 ] . bc
----- -----
[ 8 4 ]
- 5 + 6 bc = 1 bc
----------- ---
8 8
Graf50:
valeu cara, valeu mesmo
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