giải
2x - 5y + 5xy = 2x - 5y ( x-1 )
= 2x - 2 - 5y(x-1 ) = 12
= (2 - 5y) (x-1) = 12
Sau đó tìm ước
12 nha ban
chuc ban hoc tot
happy new year
Tim cac cap so nguyen (x;y) sao cho 2x - 5y + 5xy =14
tim cac cap so nguyen (x:y)sao cho 3xy-2x+y=3
tim cac cap so nguyen duong nguyen to cung nhau sao cho: (x+y)/(x^2+y^2)=7/25
tim cac cap so nguyen duong nguyen to cung nhau sao cho: (x+y)/(x^2+y^2)=7/25
mk can gap lam
tim tat ca cac cap so nguyen x,y sao cho2xy+x-2y=4
1.Tim cac cap so nguyen x,y sao cho x+y=2xy
2.Tim GTNN A = x2+3(x-1)2
cac che giup voi...chu min na....
tim cac so nguyen x,y thoa man:
5xy+x-10y=14
cuu...help meeeeee....
cho M = -5x^2y . Tim cac cap so nguyen (x,y) de M =-160
Tim cac cap so nguyen (x,y) thoa man:x-y+2xy=3
