x . ( x + 7 ) = 0
( x + 12 ) . ( x - 3 ) = 0
( - x + 5 ) . ( 3 - x ) = 0
x . ( 2 + x ) . ( 7 - x ) = 0
( x - 1 ) . ( x + 2 ) . ( - x - 3 ) = 0
Loga
Sinh Học lớp 12
