用配方法解方程:6x2-x-12=0.
人气:249 ℃ 时间:2020-02-06 02:51:57
解答
原方程可化为x
2-
x=2,
∴x
2-
x+(
)
2=2+(
)
2,
配方得(x-
)
2=
,
∴x-
=±,
解得x
1=
,x
2=-
.
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