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# c1 Watch

1. how the heck do we solve an equation like this
x-1/2 - 9x-3/2 = 20
2. (Original post by pondsteps)
how the heck do we solve an equation like this
x-1/2 - 9x-3/2 = 20
write it in a different form
you know that a minus means

and that to the power of a half means

and that to the 3/2 means

3. Perhaps if you make a substitutuion such as it may make it easier to see that you are solving a disguised cubic equation.
Looking at the discriminant of the cubic equation formed though, there aren't any real solutions to the equation so if you do want so solve it you'll have to use the cubic formula (which isn't too bad as there is no term in ).
4. (Original post by pondsteps)
how the heck do we solve an equation like this
x-1/2 - 9x-3/2 = 20
This doesn't look like a C1 problem!

Where've you got this problem from?
5. (Original post by thefatone)
write it in a different form
you know that a minus means

and that to the power of a half means

and that to the 3/2 means

lol if that's an actual c1 question that's horrible. yeah I would do what this ^ person did and then multiply everything by sqrt(x)^(3/2). that will cancel one of them out and turn the others into slightly nicer things to deal with
6. er just tried it out thats definitely not c1
7. (Original post by Nayzar)
er just tried it out thats definitely not c1
yeah turned out i was differentiating the wrong equation

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