a = 2
b = -8
c = 1
p = -b/2a = 8/4 = 2
q = -delta/4a
delta = 64-8 = 56
q = -56/8 = -7
Wierzchołek = (p;q) = (2;-7)
Pkt x to 2, a pkt y -7
[tex]Zadanie\\\\y=2x^{2}-8x+1\\\\a=2\\b=-8\\c=1\\\\ W=(p;q)\\\\p=\frac{-b}{2a}\\\\p=\frac{8}{2\cdot2}=2\\\\\Delta=b^{2}-4ac\\\\\Delta=(-8)^{2}-4\cdot2\cdot1=64-8=56\\\\ q=\frac{-\Delta}{4a}\\\\q=\frac{-56}{4\cdot2}=\frac{-56}{8}=(-7)\\\\W=(2;-7)[/tex]