(1) \(x^2-6x+9=0\)
(2) \(x^2+5x+3=0\)
(3) \(x^2-5x+4=0\)
(4) \(2x^2-6x+1=0\)
(5) \(4x^2-2x-1=0\)
(6) \(-2x^2-x-1=0\)
(7) \(5x^2-x-1=0\)
分類
(1) \(x^2-6x+9=0\)
(2) \(x^2+5x+3=0\)
(3) \(x^2-5x+4=0\)
(4) \(2x^2-6x+1=0\)
(5) \(4x^2-2x-1=0\)
(6) \(-2x^2-x-1=0\)
(7) \(5x^2-x-1=0\)