I'm stuck on this strange question:
kx^2 - (3k+2)x + (k+3) = 0 , has roots A and B.
i) Show that the roots are real and distinct for all numbers k,
ii) If A= 2/B, find K
iii) Given this value of K, without solving the equation, find the equation whose roots are -A^2 and -B^2.
I'll be honest, i've been on the first part for 2 hours now and I have no clue where to go. I've tried to use b^2 = 4ac but I can't get anywhere. Any people willing to help?
Thanks in advance!
By the way, my maths skills are only up to A Level.