Dear Sir/Madam, Could you answer this problem as soon as possible please? For what values of a is the distance between P(a, 3) and Q(5, 2a) greater than the square root of 26. Hi,Use the distance function find the distance between P and Q, that is Hence you want to find all values of a such that Since the quantities under each root are positive this is equivalent to solving Add 26 to both sides, expand the left side and simplify. You then have an inequality to solve with a quadratic on the left and zero on the right. You may find it easier to first replace the inequality by an equality and solve. Cheers,Penny
