如何解方程(5x-2)(x-7)=9(x-7)

来源：学生作业帮助网编辑：作业帮时间：2024/05/26 21:43:49

(5x-2)(x-7)=9(x-7)
(5x-2)(x-7)-9(x-7)=0
(x-7)(5x-2-9)=0
(x-7)(5x-11)=0
那么有
x-7=0 x=7
5x-7=0 x=7/5

原式=5X^2-46X+77=0
(5X-11)(X-7)=0
X=7或11//5