xy + x + y = 11
=> x(y + 1) + y + 1 = 11 + 1
=> x(y + 1) + 1(y + 1) = 12
=> (x + 1)(y + 1) = 12
lập bảng đi
sao x(y+1) thi hiu nhung ma sao lai y+1 nua vay ban
1, tìm x,y
a) xy- x - y +1= 0
b) 1/x+1/y = 1/2
giup minh voi
nhung bn thong minh oi giup mk voi
Cho ti le thuc x/4=y/7 va xy=112. tim x va y
tim so xyz biet \(\frac{x^2}{4}\)=\(\frac{y^2}{9}\)=\(\frac{z^2}{25}\)va x-y+xy=4
cac ban oi giup oi giup mk voi!!!
1/x+1/y=1/2(x,y thuoc z)
giup minh voi
(X-68) = (43/11-4) : (2121/2222-1): (333333/343434-1)
Giup em voi
xy+x+y+1=0
xy-x-y=0
xy-x-y-1=0
xy-x-y+1=0
xy+2x+y+11=0
Cho ( x-y) : (x+y) :xy = 1:7:24[voi x:y khac 0] .Tinh x ;y
tim gia tri bieu thuc lon nhat hoac nho nhat
a) (2 x -3)+4
b) | y -2|-2
c). ( x-9)2 + | y -3|+1
. Giup mk voi giup mk voi
tim cac so nguyen to x,y sao cho x^2-2y^2-1=0 GIUP MINH VOI
