https://s0.wp.com/latex.php?latex=2%5Cleft%28+-%5Cdfrac%7B4%7D%7Bp%5E2%7D+-%5Cdfrac%7B4%7D%7Bp%5E2%7D+%5Cright%29+%2B+2p+%3D+0&bg=ffffff&fg=666666&s=0