Plss help i forgot my practice book and i barowed my sisters

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

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Multiply and simplify. (x - 4) (x^2 – 5x – 6) i will mark brainliest if your answer is right. show how you got the answer. if your answer is correct but does not show how you got the answer you will not be marked brainliest.