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Suppose the decimal 0.28 is equal to 1n+2n2, where n is negative Find n.

 Oct 9, 2020
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Multiply thru by n^2 to get

 

.28 n^2 = n +2    re-arrange

.28n^2 - n -2 = 0    Quadratic formula (for the negative value)    n = - 1.42857

 Oct 9, 2020

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