A few days ago
(x-3)2+(y+1)2=9?
(x-3)2+(y+1)2=9?
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A few days ago
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(x-3)2+(y+1)2=9?
distribute the two
2x-6+2y+2=9
combine like terms
2x+2y-4=9
combine add 4 to both sides
2x+2y=13
your teacher would probably want the answer with y alone. so you do:
2x+2y=13
subtract 2x from both sides
2y=13-2x
divide all by 2
y= -x+13/2
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