Simplifique as expressões, fatorando o numerador e o denominador:
x² - 7x + 6 4x² - 4
--------------- ---------
x² - x x + 1
x² - 7x + 6 4x² - 4
--------------- ---------
x² - x x + 1
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Verified answer
x² - 7x + 6
--------------- = ( x - 1)(x - 6) ==> x - 6
x² - x x(x -1) x
4x² - 4
--------- = 4( x² - 1) ==> 4(x+1)(x-1) ==> 4(x + 1)
x + 1 x + 1
--------------- = --------------- = ------------
x² - x x( x - 1) ( x - 1)
4x² - 4 4 ( x² - 1) 4 (x+1) (x-1)
--------- = ----------- = ---------------- = 4( x-1)
x + 1 x + 1 x + 1