the points (1,-2), (3,0) and (-2,10) lie on a parabola, find its eqn
i tried doing it using simulataneous eqns and didnt get the answer :(
any help is appreciated
and a Q from the 98 HSC paper:
what is the co ord of the vertex for x*2=8(y+3)
is it (0,-3)? and the eqn of the directrix, is...