Raymond B. answered 3d
Math, microeconomics or criminal justice
y = ax^2 + bx +c is general form, also called standard form
y = a(x-h)^2 + k =standard form, also called vertex form
y = a(x-b)(x-c) is x intercept root or zero form
quadratics include more than vertical parabolas. there's other conic sections, all quadratics, circles, ellipses, hyperbolas, vertical horizontal or diagonal