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mitchelsewbaran
Group Title
An equation of a circle is x^2 + y^2 + 10x – 6y + 18 = 0. Show all your work in determining the center and radius of this circle. In complete sentences, explain the procedure used.
 one year ago
 one year ago
mitchelsewbaran Group Title
An equation of a circle is x^2 + y^2 + 10x – 6y + 18 = 0. Show all your work in determining the center and radius of this circle. In complete sentences, explain the procedure used.
 one year ago
 one year ago

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abb0t Group TitleBest ResponseYou've already chosen the best response.1
The form of the circle is: \[(xh)+(yk) = r^2 \] where (h,k) is the center of the circle, and r is the radius. What you want to do is rearrange it to get it in that form. Use algebra to group (not combine) like terms. Then complete the square
 one year ago

mitchelsewbaran Group TitleBest ResponseYou've already chosen the best response.0
what is h and k in this equation?
 one year ago

abb0t Group TitleBest ResponseYou've already chosen the best response.1
Well, that's up to you to figure out. First, group like terms: \[(x^2+10x)+(y^26y)+18 = 0\] Then, proceed to complete the square for x and y to get it in the form I stated earlier. Does that make more sense?
 one year ago

abb0t Group TitleBest ResponseYou've already chosen the best response.1
To complete the square: \[ax^2+bx + e\] you add to both sides (including product side): \[(\frac{ b }{ 2 })^2 \]
 one year ago

mitchelsewbaran Group TitleBest ResponseYou've already chosen the best response.0
i know how to complete the square
 one year ago
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