问题
解答题
①4x2-3x-1=0
②x(x-2)+x-2=0.
答案
①由原方程,得
(x-1)(4x+1)=0,
则x-1=0,或4x+1=0,
解得x1=1,x2=-
;1 4
②由原方程,得
(x+1)(x-2)=0,
则x+1=0,或x-2=0,
解得x1=-1,x2=2.
①4x2-3x-1=0
②x(x-2)+x-2=0.
①由原方程,得
(x-1)(4x+1)=0,
则x-1=0,或4x+1=0,
解得x1=1,x2=-
;1 4
②由原方程,得
(x+1)(x-2)=0,
则x+1=0,或x-2=0,
解得x1=-1,x2=2.