Rearranging Formulae HELP! GCSE level Watch

utax22
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Can someone please rearrange this to make p the subject of the formula?
Here's an image of the problem:

Thank you in advance.
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CplSkippy
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That's one horrible question!

Hold on...doing it now!

Skips


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RKM21
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Wow...furthest I got was t2 + 4 = 2p/p
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mathscot
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(Original post by CplSkippy)
That's one horrible question!

Hold on...doing it now!

Skips


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I've managed it tip get it
Will prompt you through the working
First square it

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mathscot
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[QUOTE=mathscot;51334527]I've managed it tip get it
Will prompt you through the working
First square it

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answering it directly won't help you next time

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mathscot
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T^2 =(2P-4) /p squared it

PxT^2 = 2P -4. XP

PxT^2 -2P =-4. Took away 2P

P(t^2 - 2) =-4. Factorised the left hand side

P =-4/(t^2 - 2) divided by the amount in the bracket (from previous section)

Hope that helps. I've included the steps so you know what I've done and can replicate the steps on another question

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CplSkippy
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CplSkippy
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Agree with mathscot


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utax22
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Thank you very much! I thought that this was impossible
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Hunkybm
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(Original post by utax22)
Can someone please rearrange this to make p the subject of the formula?
Here's an image of the problem:

Thank you in advance.
Hope this helps, please let me know if any of the steps are confusing.
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utax22
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(Original post by Hunkybm)
Hope this helps, please let me know if any of the steps are confusing.
Yes, the step where it says: 'pt^2-2p+4=0'. I don't get how you did this at all and also, where did you get the =0 from? Thanks
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Hunkybm
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(Original post by utax22)
Yes, the step where it says: 'pt^2-2p+4=0'. I don't get how you did this at all and also, where did you get the =0 from? Thanks
Sorry, hope this makes it clearer
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CplSkippy
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Ignore the =0 part! You factorise it due to common factors.

The line where it goes it t squared is because that is the opposite of square root, as this is what happens when you change sides, or alternatively, what is needed to cancel the square root sign on the original side.
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utax22
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Actually, don't worry, because I used the method that the other people were telling me and I get it now. Thanks to everyone for the contribution. This forum is great!
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