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lynna
New Member

USA
2 Posts

Posted - 10/16/2007 : 18:56:55

Please help me fine and equation for the left half of the circle given by (x+2)

=9

I foiled the x+2 and solved for x. the answer I got was x= -

-4x-5 but I didn't know if it was ok to still have the x in the answer.

skeeter
Advanced Member

USA
5634 Posts

Posted - 10/16/2007 : 19:28:50

(x + 2)

+ y

= 9

(x + 2)

= 9 - y

x + 2 = -

(9 - y

)

x = -[2 +

(9 - y

)]

sahsjing
Advanced Member

USA
2399 Posts

Posted - 10/17/2007 : 16:48:27

This is the same as you switch x and y, and then find the lower half of the circle.

skeeter
Advanced Member

USA
5634 Posts

Posted - 10/18/2007 : 08:13:36

quote:
Originally posted by David

Skeeter, isn't that just a translation of the entire circle to the left?
If she wants the left half, should there not be boundaries defined?

{(x-2) + y^=9; -5<=x<=-2}

plot some points using my last equation and see the result for yourself.

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