问题
解答题
解下列方程:
(1)x2-5x-6=0;
(2)2t2-5t-7=0;
(3)4x(2x-1)=3(1-2x).
答案
(1)x2-5x-6=0,
(x-6)(x+1)=0,
x-6=0,x+1=0,
x1=6,x2=-1.
(2)2t2-5t-7=0,
(2x+1)(x-7)=0,
2x+1=0,x-7=0,
x1=-
,x2=7.1 2
(3)4x(2x-1)=3(1-2x),
移项得:4x(2x-1)+3(2x-1)=0,
(2x-1)(4x+3)=0,
2x-1=0,4x+3=0,
x1=
,x2=-1 2
.3 4