What is the solution to the equation
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What is the smallest integer n such that n\sqrt{2} is greater than 20

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

What is the value of the product (3-2i)(3+2i)?