计算:x-1/x-4-3(x-1)/x-2+2
问题描述:
计算:x-1/x-4-3(x-1)/x-2+2
答
(x-1/x)-4-(3(x-1)/x)-2+2
算式是否这样?问题描述不清楚,请加上括号!x-1/x-4-【3(x-1)】/x-2+(2)=x-1/x-4-【3(x-1)】/x-2+(2)
=(x) - (1/x)- (4) - (【3(x-1)】/x)-(2) +(2)
= (x) - (1/x)- (4) - (【3(x-1)】/x)
=(x)(x) - (x)(1/x)- (4)(x) - (【3(x-1)】/x)(x)
= (x^2) - (1)- (4x) - 【3(x-1)】
= (x^2) - (1)- (4x) - (3x - 3)
= (x^2) - (1)- (4x) - 3x +3
= (x^2)- (4x) - 3x +3 - (1)
= (x^2)- (7x) + 2
x= 6.702(取至三位小数) orx = 0.298(取至三位小数)
谢谢
P.S.假如我正确地理解你的算式, 我经过运算,证实答案正确.