SOLUTION: Hi,
I'm having difficulty in solving the following problem:
Decide whether each equation has a circle as its graph. If it does, give the center and radius.
x2 + 6x + y2 +
Algebra ->
Quadratic-relations-and-conic-sections
-> SOLUTION: Hi,
I'm having difficulty in solving the following problem:
Decide whether each equation has a circle as its graph. If it does, give the center and radius.
x2 + 6x + y2 +
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Question 813721: Hi,
I'm having difficulty in solving the following problem:
Decide whether each equation has a circle as its graph. If it does, give the center and radius.
x2 + 6x + y2 + 8y + 9 = 0
Your help is GREATLY appreciated! Thank you! Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Decide whether each equation has a circle as its graph. If it does, give the center and radius.
x2 + 6x + y2 + 8y + 9 = 0
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It's a circle.
x^2 + 6x + y^2 + 8y + 9 = 0
x^2 + 6x + y^2 + 8y = -9
Complete the square for x and y.
x^2 + 6x + 9 + y^2 + 8y + 16 = -9 + 9 + 16 = 16
Center (-3,-4)
r = 4
