Đáp án:
a) $x=0;y=5$
b) $x=2;y=-2$
Lời giải:
a) $|x|.|y-5|=0$
$⇒$\(\left[ \begin{array}{l}|x|=0\\|y-5|=0\end{array} \right.\)
$⇒$\(\left[ \begin{array}{l}x=0\\y=5\end{array} \right.\)
Vậy: $x=0;y=5$
b) $|2x-4|.|3y+6|=0$
$⇒$\(\left[ \begin{array}{l}|2x-4|=0\\|3y+6|=0\end{array} \right.\)
$⇒$\(\left[ \begin{array}{l}2x-4=0\\3y+6=0\end{array} \right.\)
$⇒$\(\left[ \begin{array}{l}2x=4\\3y=-6\end{array} \right.\)
$⇒$\(\left[ \begin{array}{l}x=2\\y=-2\end{array} \right.\)
Vậy: $x=2;y=-2$
