如题所述
设a为xå¾
x²=61xx² -61x +3721/4 = 0 +3721/4x² -61x +3721/4 = 3721/4(x - 61/2)(x - 61/2) = 3721/4x - 61/2 = ±61/2x= ±61/2 + 61/2x₁ = 61x₂ = 0