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tamaranim1 [39]
3 years ago
7

Find the center and the radius of the circle with the equation: x^2 +2x + y^2-2y-14 =0

Mathematics
2 answers:
maw [93]3 years ago
6 0
X²+2x+y²-2y=14
adding 1+1 both sides

x²+2x+1+y²-2y+1=14+1+1

(x+1)² +(y-1)² = 4²

x=-1 y= 1 r = 4

hope it helps !!

FrozenT [24]3 years ago
5 0
We need to convert the equation of the circle to standard form only then we can find the radius and the center of the circle.

x^{2} +2x+ y^{2}-2y-14=0 \\  \\ 
x^{2} +2x+ y^{2}-2y=14 \\  \\ 
x^{2} +2(x)(1)+ y^{2}-2(y)(1)=14 \\  \\ 
 x^{2} +2x+1 + (y^{2}-2y+1)=14+1+1  \\  \\ 
(x+1)^{2}+(y-1)^{2} =16 


From this equation we can write:

Center of the circle is (-1,1) and the radius of the circle is 4.
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3 years ago
What is the equation of the line that passes through (4, 3) and (2, 2)?
anastassius [24]
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4 0
3 years ago
-16 + 3n = -8 - 5n what does n equal?
maksim [4K]

Step-by-step explanation:

-16 + 3n = - 8 - 5n

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N = 1

5 0
3 years ago
Read 2 more answers
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