Question

determine the vertex and the axis of symmetry for the function Y=-x^2+2x+1

Answer 1

\[Y=-x^2+2x+1\]

Answer 2

Can Somebody help me please D:

Answer 3

same magic formula as before. use
\[\frac{-b}{2a}\] for the first coordinate of the vertex. second coordinate is what you get when you plug it in

Answer 4

in this case a = -1, b = 2 so
\[-\frac{b}{2a}=-\frac{2}{2\times(-1)}=1\]

Answer 5

plug in 1 for x and you win. i get -1+2+1=2 so vertex is (1,2)