xy-3x-3y+9+5=0
x(y-3)-3(y-3)+5=0
(y-3)(x-3)=-5
nên y-3 và x-3 thuộc Ư (-5)
| y-5 | 1 | -1 | 5 | -5 |
| y | 6 | 4 | 10 | 0 |
| x-5 | -5 | 5 | -1 | 1 |
| x | 0 | 10 | 4 | 6 |
Vậy .......
a,thuc hien phep tinh: 5*(2^2*3^2)^9*(2^2)^6-2*(2^2*3)^14*3^4/5*2^28*3^18-7*2^29*3^18
b,tim cac so nguyen n sao cho: n^2+5*n+9 la boi cua n+3
c,tim x,y nguyen sao cho: xy+2*x+y+11=0
Tim so nguyen x,y sao cho
a)x-3=y.(x+2)
b)(x+1).(xy-1)=3
tim cac so nguyen x,y sao cho :xy+12=x+y
Tim tat ca cac cap so nguyen x,y sao cho
a) xy = 3
b) x(2y - 1)=8
1. tim cac cap so nguyen duong (x, y) sao cho:
2 x3 + xy = 11
2. tim cac cap so nguyen duong (x, y, z)sao cho:
x + y + z = x*y*z
3. tim x thuoc z, biet;
|x| = -2003
|x| = |-2003|
minh dang can gap lam. chieu mai phai nop rui
CAU 1: Chung to rang voi moi so nguyen n thi: (n-1).(n+2)+12 chia het cho 9.
CAU 2: Tm cac cap so nguyen (x; y) biet:
a) x.y=-2
b) (2x-1). (y+1)=14
c) xy= x+y
d) xy= x-y
GIAI NHANH GIUP TO NHE !
a, Tim cac so nguyen duong x,y nho hon 10 sao cho 3x - 4y = -21
b, tim cac so nguen x,y sao cho xy -2x + 5y -12 = 0
Tim tat ca cac cap so nguyen x,y sao cho xy-2x+y+1=0
a) tim so nguyen x sao cho : 4x+5 chia het cho 2x-1
b) tim so nguyen x va y biet : xy+3x-2y -11 = 0
giup mik nha ! ai nhanh nhat mik tick cho !