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# fp1 parametric help please watch

1. Please could somebody explain 8c on this paper to me please,

I end up with 4x-30 = 4root2 multiplied by x^1/2

I have no idea how to get the x term out of this.

https://7cba9babeb0db0ff9468853e0b2d...%20Edexcel.pdf

Many thanks.

ps I know this is an international a level, but that doesn't affect this question not being on my syllabus
2. (Original post by Nick-F007)

I end up with 4x-30 = 4root2 multiplied by x^1/2

I have no idea how to get the x term out of this.

https://7cba9babeb0db0ff9468853e0b2d...%20Edexcel.pdf

Many thanks.

ps I know this is an international a level, but that doesn't affect this question not being on my syllabus
You get a nicer quadratic if you substitute 8t^2 and 16t in for x and y in your normal equation. Once you've solved it for t, you can then substitute back to get x and y.

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