赚现金
化简: ( 3 a - 2 - 1 a + 2 ) · ( a 2 - 4 ) .
计算 x 2 + 4 x + 4 x + 2 ÷ x 2 + 2 x x - 2 - 1 .
(1)化简: ( a - 1 + 1 a - 3 ) ÷ a 2 - 4 a - 3 ;
(2)解不等式: x + 1 3 - 1 < x - 1 4 .
化简: ( x + 2 x + 1 ) ÷ x 2 - 1 x .
计算 ( a - 1 + 1 a + 1 ) ÷ a 2 + 2 a a + 1 .
化简: ( a + 1 - 4 a a + 2 ) ÷ a - 1 a + 2 .
化简: a a - 2 - 4 a 2 - 2 a ÷ a + 2 a .
计算:
(1) ( x - y ) 2 + x ( x + 2 y ) ;
(2) ( 1 - a a + 2 ) ÷ a 2 - 4 a 2 + 4 a + 4 .
(1) ( 2 m + 3 n ) 2 - ( 2 m + n ) ( 2 m - n ) ;
(2) x - y x ÷ ( x + y 2 - 2 xy x ) .
(1) ( x + y ) 2 + x ( x - 2 y ) ;
(2) ( 1 - m m + 3 ) ÷ m 2 - 9 m 2 + 6 m + 9 .
(1) a ( 2 a + 3 b ) + ( a - b ) 2 ;
(2) x 2 - 9 x 2 + 2 x + 1 ÷ ( x + 3 - x 2 x + 1 ) .
(1);
(2).
(1)计算: ( π - 3 ) 0 - 12 + 4 sin 60 ° - ( 1 2 ) - 1 ;
(2)化简: ( 2 a - 1 + 1 ) ÷ a 2 + a a 2 - 2 a + 1 .
(1)计算: ( 1 4 ) - 1 - ( π - 3 ) 0 - | - 3 | + ( - 1 ) 2020 ;
(2)化简: 2 a 2 - 2 a a 2 - 1 ÷ ( 1 - 1 a + 1 ) .
化简: ( a 2 a - 1 - a - 1 ) ÷ 2 a a 2 - 1 .
试题篮