Question

Giúp mk bài 2 vs ạ nếu có thể đc thì giúp luôn bài 3 vs ạ lm ơn đó mk đng cần gấp ngay bây h🙏🙏🙏🙏🙏🙏😭😭😭

Answer 1

Bài 2: 

a: \(\Leftrightarrow\left(x,y\right)\in\left\{\left(-5;-1\right);\left(1;5\right)\right\}\)

b: \(\Leftrightarrow\left(x-4;y+1\right)\in\left\{\left(1;2\right);\left(2;1\right);\left(-1;-2\right);\left(-2;-1\right)\right\}\)

hay \(\left(x,y\right)\in\left\{\left(5;1\right);\left(6;0\right);\left(3;-3\right);\left(2;-2\right)\right\}\)

c: =>x(y-1)-y+1=3

=>(y-1)(x-1)=3

\(\Leftrightarrow\left(x-1;y-1\right)\in\left\{\left(1;3\right);\left(3;1\right);\left(-1;-3\right);\left(-3;-1\right)\right\}\)

hay \(\left(x,y\right)\in\left\{\left(2;4\right);\left(4;2\right);\left(0;-2\right);\left(-2;0\right)\right\}\)