Help me please

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

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36