Question

Tim cac so nguyen x, y biet:  ( x - 1 ) . ( x + y ) = 33

Answer 1

Ta có: \(\left(x-1\right)\left(x+y\right)=33=1.33=33.1=\left(-1\right).\left(-33\right)=\left(-33\right).\left(-1\right)\)

Nếu x - 1 = 1 => x = 2 

       x + y = 2 + y = 33 => y =31

Nếu x - 1 =33 => x =34

        x + y = 34 + y = 1 => y = -33

Nếu x - 1 = -1 => x = 0

        x + y = 0 + y = -33 => y = -33

Nếu x - 1 = -33 => x = -32

        x + y = -32 + y = -1 => x =31

Vậy (x;y) = (2;31) ; (0;-33) ; (-32; 31) ; (34; -33)

Answer 2

x=34 ; y= -33

Answer 3

-Ta có: \(33=11.3=-11.\left(-3\right)\)

-Xét: từng trường hợp \(=>x;y\)