Solution: the intersection point d is DG//FN, and the x axis is at g.

Let d (x, y) (x >; 0)

Because the distance between d and m and y axis is equal.

So M(-x, 0)

Because 2OM = on

So N(2x, 0)

Because FN//DG

Therefore, the triangular MFN is similar to the Millennium Development Goals. The triangle OEN and ODG are similar.

So MF/FD=MN/NG

NG/GO=DE/DO

Because MF=FD

So NG=3x OG=ON+NG=5x.

So DE/DO=3/5.

Because the height of three DMOs and the ratio of three DFEs are 5:3, and the ratio of the bottom is 2: 1.

So three MDOs: three DEFs =10: 3.

Because m, d and n are in y =-x 2+bx+c.

So-x 2-bx+c = 0 ...

So y =-x 2+bx+c = 2bx. ...

-4x^2+2bx+c=0...& lt3 & gt

Because s three DEF= 12/5

So s 3 DMO =1/2 * x * y =10/3 *12/5 = 8.

& lt2> when y=2bx is replaced, x 2 = 8/b.

Daihui < 1 >& lt2>& lt3>

The solution is x=2 b=2 c=8.

So d (2,8)