Question 138130
y=-(x-2)^2 
y=-(x^2-4x+4)
y=-x^2+4x-4 (red line)
y=-(x^2-4x+4)
y=-x^2+4x-4 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, -x^2 +4x -4, -x^2 +4x -4) }}} 
 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -x^2 +4x -4 and -x^2 +4x -4).