Question 1096608
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{{{1/n + 2/n^2 = 0.28 = 28/100 = 7/25}}}<br>
Clear fractions by multiplying by the LCD, which is 25n^2:
{{{25n + 50 = 7n^2}}}
{{{7n^2-25n-50 = 0}}}
{{{(7n+10)(n-5) = 0}}}<br>
n = -10/7 or n = 5; since the problem asks for the negative value, the answer is -10/7.