Find the HCF of `18p^(2)qr , 24pq^(2)r` and `27 pqr^(2)`.

Factorise the expressions - p^(2)q - pqr^(2) - pqr +p^(2)qr^(2)

If pq + qr + rp = 0 , then what is the value of (p^(2))/(p^(2) - qr) + (q^(2))/(q^(2) - rp) + (r^(2))/(r^(2) - pq) ?

If p = 4, q= 3 and r = -2, find the values of : (p^(2)+q^(2)-r^(2))/(pq+qr-pr)

Simplify (pq - qr) ^(2) + 4 pq ^(2) r

Add the following expressions: p^2qr + pq^2r + pqr^2 and - 3pq^2r - 2 pqr^2

Given pq + qr + rp = 0 find (1)/(p^(2)-qr) + (1)/(q^(2) -rp) + (1)/(r^(2) - pq) = ?