请各位好心人帮我解释一下：

Estimation Command:
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LS(DERIV=AA) VALUE C VALUE(-1) AR(2) MA(2)

Estimation Equation:
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VALUE = C(1) + C(2)*VALUE(-1) + [AR(2)=C(3),MA(2)=C(4),BACKCAST=1]

Substituted Coefficients:
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VALUE = 0.06288317717 + 0.8492155739*VALUE(-1) + [AR(2)=-0.1296679755,MA(2)=0.2471595788,BACKCAST=1]

带下划线的部分转化成像“0.06288317717 + 0.8492155739*VALUE(-1) ”这样的代数式是什么啊？

我在做毕业论文，所以很着急，谢谢