Simplificar as seguintes frações algébricas:?
a)
8x-8y
5x-5y
b)
x²-xy
x-y
c)
x²+3x
4x+12
d)
4x-8
x-2
e)
xy-2y
x²-4x+4
f)
5x²-5
4x+4
g)
mx+m-x-1
n²-1
h)
a²ab-ac-bc
a²-ac
i)
ax²-ay²
x-2xy+y²
fatimacmarconi:
na alternativa g é m ou n??
Soluções para a tarefa
Respondido por
3
Boa tarde Cláudio
a) 8X - 8Y
-------------- =
5X - 5Y
8( X - Y) 8
= -------------- = --------
5( X-Y) 5
b) X²- XY
------------- =
X - Y
X( X - Y)
=---------------- =
X - Y
= X
C) X² + 3X X( X + 3) X
------------- = = ----------------- = -------
4X + 12 4( X + 3) 4
D) 4X - 8 4( X - 2)
-------------- = ------------------- = 4
X - 2 X - 2
E) XY - 2Y Y(X - 2) Y
------------------- = -------------------------- = --------------
X² - 4X + 4 ( X - 2) ( X + 2) X+2
F) 5X² - 5 5X(X - 1) 5(X-1)
--------------- = ------------------- = --------------
4X + 4 X( X + 1) X+ 1
G) mx + m - x - 1 m( x + 1) - ( x+1) (m - 1) ( x + 1) x + 1
-------------------------- = -------------------------------- = --------------------------- = --------------
m² - 1 (m - 1) ( m+1) (m - 1) (m + 1) m + 1
H) a² + ab - ac - bc a(a + b) - c(a + b) (a + b) ( a -c) a+b
-------------------------- = -------------------------------- = ----------------------- = ------------
a² - ac a( a - c) a( a - c) a
I) ax² - ay² a( x + y) ( x - y) a( x + y)
-------------------------- = -------------------------- = -----------------
x² - 2xy + y² (x - y) ( x - y) x - y
a) 8X - 8Y
-------------- =
5X - 5Y
8( X - Y) 8
= -------------- = --------
5( X-Y) 5
b) X²- XY
------------- =
X - Y
X( X - Y)
=---------------- =
X - Y
= X
C) X² + 3X X( X + 3) X
------------- = = ----------------- = -------
4X + 12 4( X + 3) 4
D) 4X - 8 4( X - 2)
-------------- = ------------------- = 4
X - 2 X - 2
E) XY - 2Y Y(X - 2) Y
------------------- = -------------------------- = --------------
X² - 4X + 4 ( X - 2) ( X + 2) X+2
F) 5X² - 5 5X(X - 1) 5(X-1)
--------------- = ------------------- = --------------
4X + 4 X( X + 1) X+ 1
G) mx + m - x - 1 m( x + 1) - ( x+1) (m - 1) ( x + 1) x + 1
-------------------------- = -------------------------------- = --------------------------- = --------------
m² - 1 (m - 1) ( m+1) (m - 1) (m + 1) m + 1
H) a² + ab - ac - bc a(a + b) - c(a + b) (a + b) ( a -c) a+b
-------------------------- = -------------------------------- = ----------------------- = ------------
a² - ac a( a - c) a( a - c) a
I) ax² - ay² a( x + y) ( x - y) a( x + y)
-------------------------- = -------------------------- = -----------------
x² - 2xy + y² (x - y) ( x - y) x - y
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