(5x-2)平方=3(5x-2)

问题描述:

(5x-2)平方=3(5x-2)

(5x-2)^2=3(5x-2)
25x^2-20x+4=15x-6
25x^2-35x+10=0
5x^2-7x+2=0
(5x-2)(x-1)=0
5x-2=0,x-1=0
x1=2/5,x2=1