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# FP2 help watch

1. can someone explain how the answer here concludes with "hence 2x + y = 5"

I don't see it, I'm fine with every step until that

2. (Original post by marinara pizza)
can someone explain how the answer here concludes with "hence 2x + y = 5"

I don't see it, I'm fine with every step until that
Can you show us the full question?
3. (Original post by Zacken)
Can you show us the full question?
4. (Original post by marinara pizza)
The wording is misleading, it's not "hence", it's just:

You have x and y in terms of u and v and the question gives you so replace x and y with their functions of u and v to get an equation which you can then simplify to show is a circle.

i.e: you're given 2x+y=5 and not derived it. You want to show that 2x+y is transformed to a circle.
5. (Original post by Zacken)
The wording is misleading, it's not "hence", it's just:

You have x and y in terms of u and v and the question gives you so replace x and y with their functions of u and v to get an equation which you can then simplify to show is a circle.

i.e: you're given 2x+y=5 and not derived it. You want to show that 2x+y is transformed to a circle.
oh right i see, thanks !

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