Question

Определите координаты вершин парабол а)у=х^2-7
Б) у=-х^2+2х
В) у=2х^2-8х+7

Answer 1

a)
x0 = - b/2a = - 0/2*1 = 0
y0 = - 7
(0; - 7)

б)
x0 = - b/2a = - 2/-2 = 1
y0 = - 1^2 + 2*1 = 2 - 1 = 1 
(1 ; 1)

в)
x0 = - b/2a = 8/4 = 2
y0 = 2*2^2 - 8*2  + 7 = - 1
(2; - 1)