... x ( x + 1) 5, ( x + x + 1) = ( x − 1) + 13 ( x − 1) 2 6, x + x + x + = x ( x + 1) 7, ( x − x + 1) = ( x + 1) + ( x + 1) 2 8, ( x + 3) = ( x + x − ) + ( x − ) 4 9, ( x + 1) + x ( x + 1) + x = ... 64 6 8, ( x − 1) + ( − x ) = 6 9, ( x − 1) + ( x + ) = ( x + 1) 3 10, (1 − x ) + x = 97 11, ( x + 3) − ( x − 1) = 56 3 12, x + ( x − 1) = ( x − 1) 3 13, ( x + 1) ( x + ) + ( x − 1) ( x − ) = 12 ... CREATED BY HOÀNG MINH THI; XYZ1431988@GMAIL.COM TRUNG ĐOÀN – SƯ ĐOÀN – QUÂN ĐOÀN BỘ BINH Bài Giải phương trình sau tập hợp số thực 1, ( x + 1)( x + )( x + 3)( x + ) = 120 2, ( x − 1)( x + )( x + 3)(...