pt\(\Leftrightarrow\sqrt{\left(x+3\right)\left(x+7\right)}-2\sqrt{x+7}+6-3\sqrt{x+3}=0 \)
nhầm .pt\(\sqrt{x+3}̣̣\left(\sqrt{x+7}-3\right)-2\left(\sqrt{x+7}-3\right)=0\)
\(\Leftrightarrow\left(\sqrt{x+7}-3\right)\left(\sqrt{x+3}-2\right)=0\)
\(\Leftrightarrow\left[\begin{array}{nghiempt}\sqrt{x+7}-3=0\\\sqrt{x+3}-2=0\end{array}\right.\)
bạn tự giải đc rồi nhé