Resolva as expressões algébricas:
a) (x² + 14x + 49) . (x² -49) / x² -14x +49 =
b) x² - 2xy + 4y² / x -2y =
c) a² + 6a + 9 / a² - 3a =
d) x² - 4x - 1 / x² -1 =
e) 1/ x + 1 : x + 2/ x² - 1
f) a - b / 4 (a² - b²) =
a) (x² + 14x + 49) . (x² -49) / x² -14x +49 =
b) x² - 2xy + 4y² / x -2y =
c) a² + 6a + 9 / a² - 3a =
d) x² - 4x - 1 / x² -1 =
e) 1/ x + 1 : x + 2/ x² - 1
f) a - b / 4 (a² - b²) =
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b) (x² - 2xy + 4y²) / (x -2y)
c) (a+3)²/a(a-3)
d) (x² - 4x - 1) / (x+1)(x-1)
e) 1/ (x+1) *(x+1)(x-1) /( x + 2)/= (x-1)/(x + 2)
f)( a - b) / 4(a-b)(a+b) =1/4(a+b)