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How do I solve this?

How do I solve this?
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0 votes
How do I solve this?

How do I solve this?-example-1
User Orbiting Eden
by
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2 Answers

6 votes
r²+10r+21
r²+3r+7r+21=0
r(r+3)+7(r+3)=0
(r+7)(r+3)=0
r+7=0. Or r+3=0
r=-7. Or r=-7
User MeowNET
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7.8k points
2 votes
Does this have something to do with the radius ?
User TheDaveJay
by
7.9k points
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