- For what values of k is 9x^2+kx+16 is a perfect square?

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Why the resistance in dc distribution system for the length of 100 meters(length of distributer) is assumed as r/2? What is the dielectric constant of ceramic? Can someone help me figure out this Sapling problem? The rms speed of the molecules of a gas at 145°C is 193 m/s. Calculate the mass of a single molecule in the gas.? What does a person take to fix acid refulx?

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