How are the numbers 579 and 597 different

Complete the square to determine the minimum or maximum value of the function defined by the expression. x2 − 12x − 2 a) maximum value at 38 b) minimum value at 38 c) maximum value at −38 d) minimum value at −38

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

Combine like terms to make a simpler expression 3z+z