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What is the reason behind simplifying a fraction? please explain, thank you? How many peaoyen in au? Find the quadratic function f(x)=ax^2+bx+c that goes through (3, 0) and has a local maximum at (0, 1) [Calculus]? What two variables are needed to describe a normal curve? (Statistics)? Solve the equation 2cos(x+7pi/4)= square root of 3 ,which lie in [0,2pi) .find smallest and largest solution. Please show details ! Thanks?