(PELAJARAN MATEMATIKA)

http://indonesiadata.co.id/sman2bogor/bahanajar/matematika/PERSAMAAN_KWADRAT.swf

http://books.google.co.id/books?id=2b49QXD2GwkC&pg=PA42&lpg=PA42&dq=fungsi+kuadrat+maksimum+minimum&source=bl&ots=ZJ4ODs93Zg&sig=yHBiAFsv7CIqH72xSwMxW4b9FyM&hl=id&ei=yFetTpemAcPtrAfPutjODA&sa=X&oi=book_result&ct=result&resnum=8&ved=0CD8Q6AEwBw#v=onepage&q=fungsi%20kuadrat%20maksimum%20minimum&f=false