In the figure, `M` is the midpoint of `QR`. `/_PRQ=90^(@)`. Prove that `PQ^(2)=4PM^(2)-3PR^(2)`
Channel: Doubtnut
Date: 2020-03-29

In the figure, `M` is the midpoint of `QR`. `/_PRQ=90^(@)`. Prove that `PQ^(2)=4PM^(2)-3PR^(2)`