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Mateusmarchesan
@Mateusmarchesan
December 2019
1
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Simplifique
a) a³ - a²
----------
4a² - 4a
b) 3a² - 3
-----------
a + 1
c) x³ + x²y - xy² - y³
------------------------
3x² - 3y²
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RKAM
A) a²(a-1) / 4a(a-1) = a²/4a = a/4
B) 3(a²-1) / (a+1) = 3(a+1)(a-1) / (a+1) =3(a-1)
a resolução desse questão consiste pq o a²-1 = a²-1² = (a+1)(a-1)
C)x²(x+y)-y²(x+y) / 3(x²-y²) = (x²-y²)(x+y) / 3(x²-y²)
= (x+y) / 3
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B) 3(a²-1) / (a+1) = 3(a+1)(a-1) / (a+1) =3(a-1)
a resolução desse questão consiste pq o a²-1 = a²-1² = (a+1)(a-1)
C)x²(x+y)-y²(x+y) / 3(x²-y²) = (x²-y²)(x+y) / 3(x²-y²)
= (x+y) / 3