Step-by-step explanation:
If a point [tex](x,y)[/tex] gets reflected about origin,the new point formed after reflection is [tex](-x,-y)[/tex].
Given that [tex]A=(3,5)[/tex],
So,[tex]A'=(-3,-5)[/tex]
Given that [tex]B=(-7,3)[/tex],
So,[tex]B'=(-(-7),-3)[/tex][tex]=(7,-3)[/tex]