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# Cartesian equations Watch

1. (Original post by PhysicsGal)
The book multiplied the right hand side by (x+3)/(x+3).

Now 5/5 = 1, and x/x = 1, anything divisible by itself = 1, thus (x+3)/(x+3) = 1.

So if we multiply the LHS by this 'fraction', we get y multiplied by (x+3)/(x+3) = y multiplied by 1 = y
oh right , got it!

OK

x = 3root t , y= t(4-t)

0<eqaul t <eqaul 4

I am finding it difficult to get my limits what do I do? The x value from the graph is x=0 and x=6 , but we need the limits in terms of t?
2. (Original post by otrivine)
oh right , got it!

OK

x = 3root t , y= t(4-t)

0<eqaul t <eqaul 4

I am finding it difficult to get my limits what do I do? The x value from the graph is x=0 and x=6 , but we need the limits in terms of t?
You do. Use the parametric definition of x.
3. (Original post by Indeterminate)
You do. Use the parametric definition of x.
I did but does not work.
4. (Original post by otrivine)
I did but does not work.
Of course it does.

You can solve those, right?
5. (Original post by Indeterminate)
Of course it does.

You can solve those, right?
Yes gives 2 and 0
6. (Original post by otrivine)
Yes gives 2 and 0
TWO and zero?
7. (Original post by Mr M)
TWO and zero?
You

Sorry 2 power 1/2=4

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