The maximum value of quadratic function y = - x ^ 2-4x + 3 and the equation of symmetry axis are
y=-x²-4x-4+4+3
=-(x+2)²+7
So the axis of symmetry is x = - 2
The maximum is 7
y=-x²-4x-4+4+3
=-(x+2)²+7
So the axis of symmetry is x = - 2
The maximum is 7