This question was reportedly attempted by majority of the candidates and they performed well in it.  They were able to show that if a and b are the roots, a + b = - and ab = - .  An equation whose new roots are (() can be formed by finding the sum ( + ) and products ()().  These were respectively    -  and  . 
Therefore the new equation =  +  +  = 0  º 15x2 + 34x + 18 = 0.