The vertex of the parabola defined by
f(x)=-5x^2+4×+1
is the point ( ), ( ).
the vertex is on the axis of symmetry
x = -b / 2a = -4 / (2 * -5) = 2/5
plug 2/5 into the equation to find y
f(x)=-5x^2+4×+1
is the point ( ), ( ).
x = -b / 2a = -4 / (2 * -5) = 2/5
plug 2/5 into the equation to find y