... Case 3 a2 −4b < 0 Two complex roots : а 22 : = 21.2 = λ √4b - a2 = 2 212 = ± i 2 2 2 Two distinct , real roots : · a ± √√a2 - 4b y = Дe1x + B ̧1x Y1 ...
確定! 回上一頁