Answers edited by Samuel A.

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• How do you divide #(7x^3 - x^2 – 5x – 6 )/((x + 1) )#?
  
• Question #385c9
  
• For any point #P# inside a given triangle #ABC#, denote by #x, y#, and #z# the distances from #P# to the lines #[BC], [AC]#, and #[AB]#, respectively. Find the position of #P# for which the sum #x^2 + y^2 + z^2# is a minimum.?