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chagasag
@chagasag
October 2020
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Alguém ajuda, por favor?
Supondo x e y números reais com x - y ≠ 0, simplificar a expressão algébrica: [tex] \frac{x^{3}-y^{3}}{x-y}-(x-y)^{2} [/tex]
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3478elc
Verified answer
mmc = (x-y)
x³ - y³ - (x -y)²(x - y)
( x - y )
x³ - y³ - (x
²
-2xy + y²)(x - y)
( x - y )
x³ - y³ - (x³ -2x²y + xy² - x²y + 2xy² - y³)
( x - y )
x³ - y³ - x³ + 2x²y - xy² + x²y - 2xy² + y³
( x - y )
+ 3x²y - 3xy²
( x - y )
3xy( x - y )
==>
3xy
( x - y )
2 votes
Thanks 1
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Lista de comentários
Verified answer
mmc = (x-y)
x³ - y³ - (x -y)²(x - y)
( x - y )
x³ - y³ - (x² -2xy + y²)(x - y)
( x - y )
x³ - y³ - (x³ -2x²y + xy² - x²y + 2xy² - y³)
( x - y )
x³ - y³ - x³ + 2x²y - xy² + x²y - 2xy² + y³
( x - y )
+ 3x²y - 3xy²
( x - y )
3xy( x - y ) ==> 3xy
( x - y )