用因式分解法解方程:3(x-2)=5x(2-x) (5x-1)²=2

如题所述

第1个回答  2023-03-20
3(x-2)=5x(2-x)
3(x-2)+5x(x-2)=0
(x-2)(5x+3)=0
x-2=0 x=2
5x+3=0 x=-3/5
(5x-1)²=2
(5x-1)-(√2)²=0
(5x-1+√2)(5x-1-√2)=0
x=(1-√2)/5
x=(1+√2)/5
第2个回答  2011-09-23
3(x-2)=5x(2-x)
3(x-2)+5x(x-2)=0
(x-2)(3+5x)=0
x1=2 x2=-3/5

(5x-1)²=2
5x-1=±√2
5x=±√2+1
x1=(√2+1)/5 x2=(1-√2)/5