Question

as soluções da equação (3x-9)(x-5)=0.

Answer 1

$(3x-9)*(x-5)=0 \\ \left \{ {{3x-9=0} \atop {x-5=0}} \right. \\ \left \{ {{3x=9} \atop {x-5=0}} \right. \\ \left \{ {{x=9/3} \atop {x-5=0}} \right. \\ \left \{ {{x=3} \atop {x-5=0}} \right. \\ \left \{ {{x=3} \atop {x=5}} \right. \\ x=[3,5]$