Nine-year Mathematics Provincial Proposition First Monthly Exam Solving 24 Questions with Quadratic Function
The symmetry axis of parabola (1) is a straight line x=- 1, which passes through point A (-3,0), so it passes through point B (1, 0). Let the analytical formula of parabola be y=a(x+3)(x- 1) and pass through it. So the analytical formula of parabola is y = (-√ 3/3) (x 2+2x-3). (2) AC 2 = 12, BC 2 = 4, AB 2 = 16 = AC 2+BC 2, so AC.