Solution: Because X2- 12x+32 = 0 a, we can get the AC analytical formula by bringing the c coordinate into y = kx+b.

So (x-4)(x-8)=0.

So x 1 = 4, x2 = 8.

Because of OA

So OA = 4 and OB = 8.

So a (0,4), b (8,0)

Because the quadrilateral OABC is a parallelogram

So OA=BC

So BC=4

So c(8, -4)