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Spherical astronomy question (details)? Can someone please answer my question? Please and thank you.? What is the product of x^2 − 2x + 3 and x + 1? Given chemical reaction, calculate how many moles of oxygen are needed to completely react the 5.15 moles of iron. 4 Fe + 3 O2 -> 2 Fe2O3? Can 4-bit fast adder be used to build larger fast adders? If your answer to a is Yes. Explain how it can be done?