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x=2
Aplicando Racionalizacion
lim (4 - x^2) (3 + √x^2 + 5)
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(3- √x^2 + 5) (3 + √x^2 + 5)
lim (4 - x^2) (3 + √x^2 + 5)
--------------------------------
(3- √x^2 + 5)(3 + √x^2 + 5)
Aplicando diferencia de cuadrados
lim (4 - x^2) (3 + √x^2 + 5)
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3^2 - (√x^2 + 5)^2
lim (4 - x^2)(3 + √x^2 + 5)
x=2 -----------------------------
9 - (x^2 + 5)
lim (4 - x^2)(3 + √x^2 + 5)
-----------------------------
9 - x^2 - 5
Simplificando (4 - x^2)
lim (4 - x^2)(3 + √x^2 + 5)
-------------------------------
(4 - x^2)
lim (3 + √x^2 + 5)
Reemplazar x = 2 en = 3 + √2^2 + 5
= 3 + √4 + 5
= 3 + √9
= 3 + 3 = 6