Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: a) (x+1).(y-2)=(-2) b) (x+1).(x.y-1)=3 tìm x và y thuộc Z nhanh nhất cho 5 sao cảm ơn

Toán Lớp 6: a) (x+1).(y-2)=(-2)
b) (x+1).(x.y-1)=3
tìm x và y thuộc Z
nhanh nhất cho 5 sao
cảm ơn

Comments ( 1 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    a) (x+1).(y-2)=(-2)
    => (x+1) , (y-2) in Ư(-2) = {±1 ; ±2}
    ta có bảng sau :
    \begin{array}{|c|c|c|}\hline \text{x+1}&\text{1}&\text{-1}&\text{2}&\text{-2}\\\hline \text{y-2}&\text{-2}&\text{2}&\text{-1}&\text{1}\\\hline \text{x}&\text{0}&\text{-2}&\text{1}&\text{-3}\\\hline \text{y}&\text{-4}&\text{0}&\text{-3}&\text{-1}\\\hline\end{array}
    Vậy…………..
    b) (x+1).(x.y-1)=3
    => (x+1) , (x.y-1) in Ư(3) = {±1;±3}
    ta có bảng các số x là : 
    \begin{array}{|c|c|c|}\hline \text{x+1}&\text{1}&\text{-1}&\text{3}&\text{-3}\\\hline \text{x}&\text{0}&\text{-2}&\text{-4}&\text{-2}\\\hline\end{array}
    ta có bảng sau : 
    \begin{array}{|c|c|c|}\hline \text{x.y-1}&\text{3}&\text{-3}&\text{1}&\text{-1}\\\hline \text{x+1}&\text{1}&\text{-1}&\text{3}&\text{-3}\\\hline \text{y}&\text{∅}&\text{1}&\text{∅}&\text{0}\\\hline \text{x}&\text{0}&\text{-2}&\text{-4}&\text{-2}\\\hline\end{array}
    Vậy ………………

Leave a reply

222-9+11+12:2*14+14 = ? ( )