new file: Diem/diem_thuong_xuyen_2019_2020.fods

	modified:   Giai_PT/ham1bien.m
	modified:   Giai_PT/newton_tb.m
	modified:   Giai_PT/plotfunc.m
	modified:   Giai_PT/pplap_tb.m
	modified:   Phuong_phap_tinh_co_ban.fodp
	modified:   Phuong_phap_tinh_co_ban.odp
	modified:   Phuong_phap_tinh_co_ban1.fodp
	new file:   bai_tap_sv/2019-2020/phuong_phap_chia_doi-Nguen_Duc_Trung.f90