动梁搏做漫父爱如山
(2 + 8b/3)^2 - 4 * 25/9 * (b^2 - 3) = 0
4 * (1 +16b^2 / 橡衡9 + 银宴8b/3) - 100b^2/9 + 100/3 = 0
9 +16b^2 + 24b - 25b^2 + 75 = 0
-9b^2 + 24b + 84 = 0
3b^2 - 8b - 28 = 0
(3b - 14)(b + 2 ) = 0
b = 14/3 或者 -2
求动漫父爱如山百度云资源
Simone
发布于 2023-04-20 09:19:56
657 阅读
