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Notice: error_log(): write of 113 bytes failed with errno=28 No space left on device in /www/wwwroot/seo-dashuju-wenxue/code/logginfo/SimpleLogger.php on line 199 常识“开方术”是什么意思，起源、典故、生平简介及释义-历史文化
＝
，对后者，
。后人对开方不尽数提出以
为近似值。刘徽则提出继续开方求其微数，以十进分数逼近无理根的方法。北宋贾宪又提出增乘开方法，程序较《九章算术》简便。（2）古代指现今求一元方程正根的方法。解二次方程称为开带从方，《九章算术》已有，南朝祖冲之开差立、开差幂，兼以正负参之，可能是带负系数的二次、三次方程，后失传。王孝通引入若干正系数三次、四次方程，北宋刘益重新引入负系数二次方程，提出益积开方术和减从开方术。南宋秦九韶提出正负开方术，是以增乘开方法为主导，求有理系数高次方程正根的完备方法。清李锐提出方程有负根、重根的问题。