A<0, b>0, c>0, (1) error;
When x=- 1, y = a-b+c.
Y = 4a2-2b+c < 0, (3) wrong;
-b/2a= 1,2a=-b,a-b+c & lt; 0.2a-2 b+ 2c & lt; 0,2c & lt3b, (4) right;
If a-b >; M(am+b), then a-b+c >; When Am2+bm+c, x=- 1, y is not the maximum value, not necessarily greater than the value of y when X=m, (5) Wrong.