Question

xy = 3x + 5y =  2

Answer 1

Sửa đề: xy+3x+5y=2

xy+3x+5y=2

=>x(y+3)+5y+15=2+15

=>(x+5)(y+3)=17

=>(x+5;y+3)∈{(1;17);(17;1);(-1;-17);(-17;-1)}

=>(x;y)∈{(-4;14);(12;-2);(-6;-20);(-22;-4)}