Question

What is the equation of the circle with a diameter whose endpoints are (-3,-9) and (-7,1)?

Answer 1

Answer:

12

Step-by-step explanation:

Answer 2

Answer:

( x + 5 )² + ( y + 4 )² = 29

Step-by-step explanation:

Equation of the circle is

( x - h )² + ( y - k )² = r²

( h, k ) are coordinates of the center

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Coordinates of the center of the circle are

( $\frac{-3-7}{2}$ , $\frac{-9+1}{2}$ ) = ( - 5 , - 4 )

d = 2√29 ⇒ r = √29

( x + 5 )² + ( y + 4 )² = 29