[tex]\Large\boxed{\begin{array}{l}\sf4x^2-5x=0\\\sf x(4x-5)=0\\\sf x=0\\\sf 4x-5=0\\\sf 4x=5\\\\\sf x=\dfrac{5}{4}\\\\\sf S=\bigg\{0,\dfrac{5}{4}\bigg\}\end{array}}[/tex]
