Find the values of p for which the quadratic equation (2p + 1)x² – (7p + 2)x + (7p – 3) = 0 has equal roots. Also, find the roots.

What would happen if the gametes do not have half the chromosome number as the skin parent?

How many airports are there in India? How many of them are international airports, domestic airports and civilian airports?

Find the Cartesian equations of the line which passes through points (3, -2, -5) and (3, -2, 6).