关于x的一元二次方程ax²+bx+ $\frac{1}{4}$ =0有两个相等的实数根，写一组满足条件的实数a，b的值，a=____，b=____．

阅读下面的古诗。
                                                                                                                                                  画眉鸟
                                                                                                                                                  欧阳修
                                                                                                                         百啭千声随意移，山花红紫树高低。
                                                                                                                         始知锁向金笼听，不及林间自在啼。