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More: How many grams are percent in 4.336x10^24 formula units of table salt, NaCl, whose molar mass is 58.44 g/mol? Do you suppose we will discover real live Sheep on Mars next? Received the following problem, can't figure out how to factor completely as instructed. Can you show the steps to solve? 2(x+y)^2-3(x+y)+1? Maths question no 19 &20? I am starting a BS in astrophysics, with the goal of working at an observatory. What advanced math classes would be most useful to me?