Question 160331
 x^2 + 7x - 8 (red curve)
f(x) = x^2-5x+6 (green curve)
{{{ graph( 300, 200, -16, 5, -20, 10, x^2 +7x -8, x^2 -5x +6) }}} (graph 300x200 pixels, x from -16 to 5, y from -20 to 10, of TWO functions x^2 +7x -8 and x^2 -5x +6). 
RED CURVE: symmetry x=-3.5, axis=(-3.5,-20.25).
GREEN CURVE: symmetry x=2.5, axis=(2.5,-.25)