P’ is the picture of P under reflection in the x-axis. If the co-ordinates of P’ are $(2,10)$, then mention the co-ordinates of P.
P’ is the picture of P under reflection in the x-axis. If the co-ordinates of P’ are $(2,10)$, then mention the co-ordinates of P.

From the question  P’ $=(2,10)$is given

Then, $( 2,-10)$is the co-ordinates of P under reflection in the x-axis.