B

mik cung ko chac lam ban cho may ket qua tiep nhe 

=\(3x-3y-y\)\(^2\)\(+x\)\(^2\)

=\(3(x-y)\)(\(y-x)(y+x)\)

=\(3(x-y)(x-y)(x+y)\)

=\(3(x+y)\)

tick nha 

C 

tick nha thanks

theo em minh la nguoi ko co tinh tu lap luon dua dam vao nguoi khac 

neu e la minh e se truong thanh ko dua dam vao nguoi khac 

viet 1 bai van hay doan van 

meo de lap cong thuc hoa hoc 

a.Na(I) va O(II) => hoan doi NA(II) va O(I) 

ta duoc => NA\(_2\)O (co mik chi khi lm trac nghiem ak) 

xin loi vi may tinh mik ko danh dau dc .ban chiu kho doc nha ,dung tick mik thanks

the loai truyen ngan 

PTBD la tu su ket hop mieu ta va bieu cam

noi dung chinh :  la con nguoi song tinh nghia ,co nhan cach cao quy ,thuy chung ,1 nguoi cha yeu thuong con sau sacmuon danh dum tat ca de cho con 

mang so phan dang thuong cua nhung nguoi truoc cach mang

tinh thai tu mik chx biet 

may tinh mik ko danh dau dc ban chiu kho doc ,dung tick mik nha 

1a

2c

3c

tick nha

D chuyen dong theo quy dao bat ki