Graph the domain and range

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

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract