tìm x, y là các số nguyên

a,xy-x+2y=5

b,2xy+6x-4=0

c,xy-2x=3y-4

d,x^2-y^2=91

giai gium minh nha cac ban

1. x²+y²-2xy -2x+2=0

2.(x+2)⁴+(x+8)⁴=272

3. (x-2)⁶+(x-4)⁶=64

giai pt . ghi cach giai gium minh. minh tick cho

ccccoooo aaaaiiii kkkkeeeetttt bbbbaaaannnn kkkkoooo

giai gium minh bai toan tren nhe

heheh xin chao cac ban mik la cau be ngu ngo cac bna giai gium mik bai toan

x³+y⁴+15+74=x

tim x

giup minh giai bai toan nay nhe:

|x|+|x+2|=0

Tim x, biet

x^3+6x^2+9x-x^4=0

giup minh giai bai toan nay nhe , minh like cho

co 4 ban cung thi giai toan nhu sau. moi nguoi phai giai 4 bai toan .neu giai dung 1 bai thi duoc 2 diem ,con neu sai mot bai thi tru 2 diem . neu so diem bi tru bang hoac lon honso diem dat thi coi nhu la 0. trong cuoc thi nay chac chan it nhat co 2 ban cung diem . em giai thich dieu do ? nhanh len, minh can gap

minh co bai toan lop 8nho cac ban giai gium

a) 3x-2=2x+5 =?

b) 4x+2=-3x-5 =?

giai ho minh nha 

cam on cac ban (>_<)

Which of the following numbers is the greatest?

Co ai giai duoc bai toan nay khong?Neu ai giai thi ghi loi giai thich ra tai sao lai giai nhu vay gium minh luon nha.Cam on.