A - y = x2– 4x – 4 = 0

B - y = 12x2+ 5x + 1 = 0

C - y = -23x2+ 7x -4 = 0

D - y = 3x2– x -10 = 0

E - y = 30x2+ 5x – 7 = 0

I've done these already but my Teacher said I done them wrong, I got to show workings or something, I don't have a Clue what he is on about, I have the formulae but don't know how to display on forum

*All theBoldnumbers are superscript, again, I don't know how to display on forum, this work has to be Friday, not that important, but don't have time to do it again.