29levelupchaye2 29levelupchaye2

07-04-2018
Mathematics

contestada

Part a) Write the equation of the circle by completing the square.

Part b) What is the center and the radius of the circle?

x2 + 4x + y2 - 2y = 20

Respuesta :

mkryukova19 mkryukova19

07-04-2018

x² +4x+y²-2y=20
x²+2*2x+4 +y²-2y+1 =20+4+1
(x+2)²+(y-1)²= 25
(x+2)²+(y-1)²= 5²
center (-2,1)

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