quadratic is 0=ax²+bx+c
one way is completing the square
that is, get it into a form like k=a(x-h)²
2nd way is factoring
like into form 0=(ax-b)(cx-d)
3rd way is quadratic equation
for 0=ax²+bx+c, [tex]x=\frac{-b+/-\sqrt{b^2-4ac}}{2a}[/tex]
2 solutions max because it is 2nd degree
solutions can be called zeroes because that is where y=0
they can also be called roots
