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What is the difference between TED talks and TEDx talks? If a and b are roots of equation x^2 +x -12 =0 such that a>b then equation whose roots are 2a and 3b is ?Please!? Electromagnetic induction occurs when what? Why is the presence of a larger than normal number of neutrophils indicative of an infection? Explain your answer.? A 2.012 g sample of a compound of nitrogen and oxygen has 0.522g of nitrogen. Calculate its empirical formula.?