Question

[channel Anhthư]

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(x+2)(y-3)=5

Tìm giá trị nguyên của x, y thỏa mãn 
Giúp mình nha, thankssss

Answer 1

[I don't need you]

ta có: ( x+2).(y-3) = 5 = 5.1 = ( -5). (-1)

TH1:

* x+2 = 5 => x = 3 ( TM)

y - 3 = 1 => y= 4 (TM)

* x+2 = 1 => x = - 1 ( TM)

y- 3 = 5 => y = 8 (TM)

TH2:

* x + 2 = -1 => x = -3 ( TM)

y - 3 = - 5 => y = - 2 ( TM)

* x + 2 = -5 => x = - 7 ( TM)

y - 3 = - 1 => y = 2 (TM)

KL: \(\left(x;y\right)\in\left\{\left(3;4\right);\left(-1;8\right);\left(-3;-2\right);\left(-7;2\right)\right\}\)