t = pqr−r2q\sqrt{\frac{pq}{r} - r^{2}q}rpq−r2q
Take the square of both sides
t2^{2}2 = pqr\frac{pq}{r}rpq - r2^{2}2q
t2^{2}2 = pq−r3qr\frac{pq - r^{3}q}{r}rpq−r3q
cross multiply
rt2^{2}2 = pq - r3^{3}3q = q(p - r3^{3}3)
q = rt2p−r3\frac{rt^{2}}{p - r^{3}}p−r3rt2
