(x+5/3)*(x-5/4)=0
⇒x+5/3 =0 ; x-5/4 =0
⇒x=-5/3 ; x=5/4
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$(x+ \frac{5}{3})(x-\frac{5}{4})=0$
⇔\(\left[ \begin{array}{l}x+ \frac{5}{3}=0\\x-\frac{5}{4}=0\end{array} \right.\)
⇔\(\left[ \begin{array}{l}x= -\frac{5}{3}\\x=\frac{5}{4}\end{array} \right.\)
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