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Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.

Need plz been trying to do it for a long time and still haven’t succeeded