Đáp án:
Giải thích các bước giải:
a,(x+3)(y+1)=5
⇒\(\left[ \begin{array}{l}x+3=1\\y+1=5\end{array} \right.\)
\(\left[ \begin{array}{l}x+3=5\\y+1=1\end{array} \right.\)
\(\left[ \begin{array}{l}x+3=-1\\y+1=-5\end{array} \right.\)
\(\left[ \begin{array}{l}x+3=-5\\y+1=-1\end{array} \right.\)
⇒\(\left[ \begin{array}{l}x=-2\\y=4\end{array} \right.\)
\(\left[ \begin{array}{l}x=2\\y=0\end{array} \right.\)
\(\left[ \begin{array}{l}x=-4\\y=-6\end{array} \right.\)
\(\left[ \begin{array}{l}x=-8\\y=-2\end{array} \right.\)
b,c bạn làm tương tự nhé
