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. 55 25 ( )
12 ( ) 11 ( ) 4 9 ()
x(
10 ( )
−(2x + 5) < x − 3 < 2x + 5 )
)
x > 2 ( ) −8 < x < − 2 ( ) x > −8 ( ) x > −2 ()
)
33 3
( )− x 2 + 3x + 2 < x + 2 < x 2 + 3x + 2 x(
x < −2 ( ) x > 0 ()
−2 < x < 0 ( ) x < −2 x>0 ( )
x < 16 x(
x
0<x <4 ()
x < −4 0 < x < 4 ( ) x < −4 ( )
x < −4 x > 4 ( )