Saturday

September 20, 2014

September 20, 2014

Posted by **zachary** on Friday, October 26, 2012 at 5:36pm.

x^2 +y^2+8x+2y+8=0

- college algebra -
**Steve**, Friday, October 26, 2012 at 5:53pmrearrange things a bit to get

x^2+8x + y^2+2y = -8

Now complete the squares:

x^2+8x+16 + y^2+2y+1 = -8 + 16 + 1

(x+4)^2 + (y+1)^2 = 9

center at (-4,-1)

when y=0,

(x+4)^2 + 1 = 9

(x+4) = ±√8

x = -4 ± √8

similarly for y when x=0

**Answer this Question**

**Related Questions**

College Algebra - Write the equation of the circle in standard form. Find the ...

College Algebra - Write the equation of the circle in standard form. Find the ...

College Algebra - Write the equation of a circle in standard Find the center, ...

Algebra - 2. Write the equation of the circle in standard form. Find the center...

Algerbra - Write the equation of the circle in standard form. Find the center, ...

Math - write the equation of the circle in standard form. find the center, ...

pre calculus - Write the equation of the circle in standard form. Find the ...

college algebra - Write the equation of the circle in standard form. Find the ...

Math - These questions that I have completed are on a test review for my exam ...

NEED MAJOR HELP! *QUADRATIC EQUATIONS* - Write the equation for the circle with ...