Question

Which figure is described below?

Answer 1

Answer:

C )  circle

This equation represents circle

    x²-2 x+y²+4 y  - 31 =0

Step-by-step explanation:

Explanation:-

let P(x₁ , y₁) be the locus point

Let P(x₁ , y₁) and A(1,-2)

Given data PA = 6

                 PA² = 6²

  ( x₁ -1 )²+(y₁+2)² = 36

  x₁²-2 x₁+1+y₁²+4 y₁ +4 = 36

  x₁²-2 x₁+y₁²+4 y₁  = 36-5

  x₁²-2 x₁+y₁²+4 y₁  - 31 =0

This equation represents circle

    x²-2 x+y²+4 y  - 31 =0