2如果定义a*b=a(ab-3),则方程（-2）*X=8的解是?
人气：347 ℃ 时间：2020-02-05 02:45:10
解答
∵a*b=a(ab-3)
∴(-2)*x=(-2)[(-2)x-3]=8
4x+6=8
x=1/2
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