T2T || FAQ || Ask T2T || Teachers' Lounge || Browse || Search || Thanks || About T2T
View entire discussion
[ next >>]
From: Doug Shields <firstname.lastname@example.org> To: Teacher2Teacher Public Discussion Date: 2004040514:11:09 Subject: Algebraic expression of the vertex of the Phantom Parabola I love the phantom parabola idea. Here might be an addendum to that day's lecture: The vertex of the parabola corresponding to y = ax^2 + bx + c is at (-b/2a, -b^2/4a + c). If the roots of the equation are complex, and we write the solutions as r +/- si, then the coordinates of the vertex are simply (r, as^2). Doug.
Math Forum Home || The Math Library || Quick Reference || Math Forum Search