vickeryw

It's supposed to say (your) and f a r t. I can't believe they censored that. Anyway CPhill, this old coot thanks you for your help. I do have one more question. How do you know when to put the points as (-#,0),(#,0) vs. (#,0),(-#,0)? While I got the answer right, (2√6/5,0),(-2√6/5), the test said I got it wrong because I didn't put it as (-2√6/5,0), (2√6/5,0). What difference does it make which order the pairs are as long as they are correct?

I really do appreciate yor help with this old f**t. Thanks.

I think I figured it out. I forgot that the major axis is vertical, with the y-axis at (0). Sorry, I was overthinking it.

Sorry about that. I'm trying to work as a line mechanic while doing this homework quiz and forgot to put it in. The original problem is: 81x²+25y²=2025.

I get the 81x²/2025+25y²/2025=2025/2025 is x²/25+y²/81=1, the I s***w up. I've got the vertices at (0,9),(0,-9) for the major axis and (5,0),(-5,0) for the minor axis. I thought I had the foci correct with c²=a²-b²: c²=81-25=56; c²=56; c=√56. It's here I screwed up, I think. I don't remember when to put the 2√4 in the x or y position.

Thanks Ron. It does help.

That actually does help CPhill. I'm sorry I didn't respond sooner. I had to come to work and am just now getting a chance to see this. I really do appreciate the help.

I can see how 4(y-4)²/16 can become (4) now, but how does (x+3)²/16 become -3?

Thank you CPhill.

I guess I should have stated that I need the steps on how they get their answer. I know "what" the answer is, just don't know how they got it.

I appreciate that. I am trying to find a step by step. My old and addled brain is not seeing how this turns into (-3,4). It's been too long since I've had to take this kind of math. While Desmos is good at showing the end result, it sucks for show how it got there.