If p,q,r are any real numbers, then
Factorise: (p2+q2−r2)2−4p2q2
The dual of statement p∨(q∧r)≡(p∨q)∧(p∨r) is
If px2 + qx + r = 0 has no real roots and p, q, r are real such that p + r > 0 then