整理得x^2-x+1/4=26731857/4(x-1/2)^2=26731857/4,解得x=(1土√26731857）/2.可以吗？
X²=6682964+XX²-X=6682964X²-X+1/4-1/4=6682964（X-1/2）²-1/4=6682964 (X-1/2)²=6682964.25X-1/2=√6682964.25X=0.5+√6682964.25X≈2585.643
见图
