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=-

1
2
,x2=7.

       

(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=

1
2
,x2=-
3
4

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