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Tim (x,y) nguyen biet a) x + y = x : y = xy b) 2x + 3y + 3xy = 7
Tim (x,y) nguyen biet
a) x + y = x : y = xy
b) 2x + 3y + 3xy = 7
tim cac so nguyen x,y biet x^2-(y-3)x-2y-1=0
tim x,y biet 5x^2 -2xy+ 2y^2=18 ; x,y la so nguyen
tim x,y la so nguyen biet : 3x-2y-xy=1
Tim x,y nguyen biet \(\left(x+1\right)\left(x-1\right)=2y^2\)
Tim x, y nguyen biet: 5-y^2= 4(x-2016)^2
tim so nguyen x,y biet 3/x+y/5=11/6
Tim so nguyen x,y biet x^2-y^2=5
