Giải các phương trình sau
a ) ( 2x + 1 ) ( x - 1 )=0
b ) ( x + ² ) ( x - 1 ) = 0
c ) ( 3x - 1 ) ( 2x - 3 ) ( x + 5 ) = 0
d ) 3x - 15 = 2x ( x - 5 )
e ) x² - x = 0 f ) x² - 2x = 0
g ) x² - 3x = 0
h ) ( x + 1 ) ( x + 2 ) = ( 2 - x ) ( x + 2 )
b ) ( x + ² ) ( x - 1 ) = 0
c ) ( 3x - 1 ) ( 2x - 3 ) ( x + 5 ) = 0
d ) 3x - 15 = 2x ( x - 5 )
e ) x² - x = 0 f ) x² - 2x = 0
g ) x² - 3x = 0
h ) ( x + 1 ) ( x + 2 ) = ( 2 - x ) ( x + 2 )