deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 76ee29a..70bd64a 100644  --- a/untitled.tex  +++ b/untitled.tex 
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\\  $c = \sum_{i=1}^{m}$\\  \\  $\sum_{i=1}^{2}a_i^2 + \sum_{i\neq j}a_ia_j = c$\\ c^2$\\  \\  $\Leftrightarrow a_1^2+a_2^2+2a_1a_2 = c$\\ c^2$\\  \\  $\Leftrightarrow a_1^2+(c-a_1)^2+2a_1(c-a_1) = \sum_{i=1}^{2}a_i$\\ c^2$\\  \\  $\Leftrightarrow a_1^2+c^2-2a_1+a_1^2+2a_1-2a_1^2=c$\\ a_1^2+c^2-2a_1+a_1^2+2a_1-2a_1^2=c^2$\\