>
数学
>
解方程:
(1)3x
2
=5x;
(2)9(x-1)
2
-(x+2)
2
=0.
人气:427 ℃ 时间:2020-05-09 00:34:56
解答
(1)方程变形得:x(3x-5)=0,
可得x=0或3x-5=0,
解得:x
1
=0,x
2
=
5
3
;
(2)分解因式得:(3x-3+x+2)(3x-3-x-2)=0,
可得4x-1=0或2x-5=0,
解得:x
1
=
1
4
,x
2
=
5
2
.
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