# Anyone Good with conics?

• Aug 30th 2009, 07:56 PM
Minieke
Anyone Good with conics?
The length of the latus rectum of 25x^2 + 9y^2 - 150x - 90y + 225 = 0 is _______
1)18/5
2)16/15
3)225/25
4)15/16

The length of the latus rectum of 25x^2 - 36y^2 = 225 is _______
1)5/6
2)9/6
3)25/6
4)6/25

Multiple choice problems
IDK how to find the latus rectum, i think i was absent that day.
Anyone wanna help?=]
• Aug 30th 2009, 08:44 PM
mr fantastic
Quote:

Originally Posted by Minieke
The length of the latus rectum of 25x^2 + 9y^2 - 150x - 90y + 225 = 0 is _______
1)18/5
2)16/15
3)225/25
4)15/16

The length of the latus rectum of 25x^2 - 36y^2 = 225 is _______
1)5/6
2)9/6
3)25/6
4)6/25

Multiple choice problems
IDK how to find the latus rectum, i think i was absent that day.
Anyone wanna help?=]

A good start would be to get a copy of the class notes that you missed that day. Once you have those notes and have worked through them, you might be able to answer these questions. If not, please post what you know and where you get stuck.