1. Tìm x,y thuộc Z:
a, \(\left(x+1\right)\left(y-5\right)=17\)
b, \(\left(2x-1\right)\left(y+4\right)=10\)
c, \(x.y-2x+y=8\)
d, \(x.y+4y-3x=1\)
2. Tìm x,y thuộc Z để:
a, \(\left(x+1\right)^2+\left(y+5\right)^2=16\)
b, \(\left(x+4\right)^2+\left(y-2\right)^4=5\)
c, \(|x-3|+\left(y-7\right)^2=3\)
d, \(\left(x-7\right)^2+\left(y-2\right)^2=20\)
3. Tìm a,b,c biết:
a, \(\overline{4a7b⋮}\)\(225\)
b, \(\overline{1a21b⋮}\)\(12\)
c, \(\overline{a165b⋮}\)\(55\)
d, \(\overline{313ab⋮}\) \(37\)
e, \(\overline{61ab⋮}\) \(79\)
g, \(\overline{11abc⋮}\)\(437\)
h, \(\overline{261abc⋮}\) \(713\)
Giải nhanh hộ mình nhé!!
