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m"},{"type":"expression","id":"171","folderId":"170","color":"#000000","latex":"\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}\\left(-2x_{1}\\left[n\\right]y_{1}\\left[n\\right]+2mx_{1}\\left[n\\right]^{2}+2x_{1}\\left[n\\right]c\\right)=0"},{"type":"expression","id":"175","folderId":"170","color":"#388c46","latex":"\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}\\left(2x_{1}\\left[n\\right]^{2}m+2x_{1}\\left[n\\right]c\\right)=\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}\\left(2x_{1}\\left[n\\right]y_{1}\\left[n\\right]\\right)"},{"type":"expression","id":"176","folderId":"170","color":"#6042a6","latex":"2\\left(\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}\\left(x_{1}\\left[n\\right]^{2}\\right)\\right)m+2\\left(\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}x_{1}\\left[n\\right]\\right)c=2\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}x_{1}\\left[n\\right]y_{1}\\left[n\\right]"},{"type":"expression","id":"177","folderId":"170","color":"#000000","latex":"\\left(\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}x_{1}\\left[n\\right]^{2}\\right)m+\\left(\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}x_{1}\\left[n\\right]\\right)c=\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}x_{1}\\left[n\\right]y_{1}\\left[n\\right]"},{"type":"text","id":"174","folderId":"170","text":"find zeroes of derivative wrt c"},{"type":"expression","id":"172","folderId":"170","color":"#c74440","latex":"\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}\\left(-2y_{1}\\left[n\\right]+2mx_{1}\\left[n\\right]+2c\\right)=0"},{"type":"expression","id":"178","folderId":"170","color":"#c74440","latex":"\\left(\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}x_{1}\\left[n\\right]\\right)m+\\operatorname{length}\\left(y_{1}\\right)c=\\left(\\sum_{n=1}^{\\operatorname{length}\\left(y_{1}\\right)}y_{1}\\left[n\\right]\\right)"},{"type":"folder","id":"181","title":"Cramer's 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