{"trustable":true,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003e\u003cspan style\u003d\"font-size: 11pt\"\u003e求下面方程的根:\u003c/span\u003e\u003cspan style\u003d\"font-size:11.0pt;font-family:\u0027Times New Roman\u0027,serif\"\u003ef(x) \u003d x\u003csup\u003e3\u003c/sup\u003e- 5x\u003csup\u003e2\u003c/sup\u003e+ 10x - 80 \u003d 0\u003c/span\u003e\u003cspan style\u003d\"font-size: 11pt\"\u003e。\u003c/span\u003e\u003cbr\u003e\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"-"}},{"title":"Output","value":{"format":"HTML","content":"精确到小数点后9位。"}},{"title":"Sample","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e-\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003e-\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}}]}