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para obtener p(x-3) restamos 6 a x:
p(x - 6 + 3) = x - 6 -3
p(x - 3) = x - 9
q(x - 3) = x + 3
para obtener q(x+3) sumamos 6 a x:
q(x + 6 - 3) = x + 6 +3
q(x + 3) = x + 9
restamos
q(x + 3) - p(x - 3)
x + 9 - (x - 9 )
x + 9 - x + 9
18
Por lo tanto q(x + 3) - p(x - 3) = 18
P(x + 3) = (x+ 3) - 6
P(x) = x - 6
----> P(x - 3) = x - 3 - 6
P(x - 3) = x - 9
Q(x - 3) = x + 3
Q(x - 3) = (x - 3) + 6
Q(x) = x + 6
-----> Q(x + 3) = x + 3 + 6
Q(x + 3) = x+ 9
Restando: Q(x + 3) - P(x - 3)
(x + 9) - (x - 9)
x + 9 - x + 9
18 ...... Rpta