Question

The circle $x^2+y^2+4x-4y+4=0$ touches

• A. x-axis
• B. y-axis
• C. x-axis and y-axis
• D. None of these

Answer 1

The correct option is C

x-axis and y-axis

$x^2+y^2+4x-4y+4=0$

$x^2+4k+y^2-4y+4=0$

$(x+2{)}^2+(y-2{)}^2-4=0$

$(x+2{)}^2+(y-2{)}^2=4$