(X-120)(X-130)=1600

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 12:55:57
(X-120)(X-130)=1600(X-120)(X-130)=1600(X-120)(X-130)=1600(x-120)(x-130)=1600分解得x-250x+14000=0x=[-b+√

(X-120)(X-130)=1600
(X-120)(X-130)=1600

(X-120)(X-130)=1600
(x-120)(x-130)=1600 分解得 x-250x+14000=0 x=[-b+√(b-4ac)]/2a或 x=[-b-√(b-4ac)]/2a则 x=125+5√65或 x=125-5√65