" (ii) "2p^(2)-q^(2)+3r^(2)

if q is the mean proportional between p and r , prove that : p^(2) - q^(2) + r^(2) = q^(4) ((1)/(p^(2))-(1)/(q^(2)) + (1)/(r^(2))) .

Find the value if (p^(2)+q^(2))/(r^(2)+s^(2)) if p:q: : r:s

If p = 4, q= 3 and r = -2 find the value of p^(2)+q^(2)-r^(2)

Multiply the - 7p q ^(2) r ^(3), 12 p ^(2) q ^(2) r

If p = 3, q = 2 and r = -1, find the values of 2p^(2)+3a^(2)-r^(2)+2pr-5pqr

If cos^(-1)p+cos^(-1)q+cos^(-1)r=3pi , then p^(2)+q^(2)+r^(2)+2pqr is equal to

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

Find the value of (p^(2)+q^(2))/(r^(2)+s^(2)) , if p:q=r:s