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# Core 1 Surds help please! watch

1. Basically the question is
Two lines have equations
Y=root2 x+9
y=10-x
I know you do root2 x+9=10-x,
Then you get root2+2x=1
2x=1-root2
And i get x=1-root2/2
The answer should just be x=1-root2
Where did igo wrong?
Thanks
2. I think the answer is actually .

I'm not going to show you all the steps, but the first few so you can see where you've gone wrong:

3. (Original post by ViralRiver)
I think the answer is actually .

I'm not going to show you all the steps, but the first few so you can see where you've gone wrong:

After that would you do x-1=root2+1?
4. (Original post by mamma_mia123)
After that would you do x-1=root2+1?
no

the x is times the bracket so you need to divide
5. (Original post by TenOfThem)
no

the x is times the bracket so you need to divide
So its 1/x=root2+1
then what?
6. Since you want x on its own you would divide by the bracket so that you have x =

Then you need to rationalise the denominator
7. (Original post by TenOfThem)
Since you want x on its own you would divide by the bracket so that you have x =

Then you need to rationalise the denominator
Thanks, i actually forgot whqt i was trying to find btw, i you had 4root6pi/4, could you cancel down to root6pii (pi root 6)?
8. (Original post by mamma_mia123)
Thanks, i actually forgot whqt i was trying to find btw, i you had 4root6pi/4, could you cancel down to root6pii (pi root 6)?
If you're asking whether , then yes it does.
9. (Original post by ViralRiver)
If you're asking whether , then yes it does.
Hello, would 1/4 x2 multiplied by x2=1/4 x4?
10. (Original post by mamma_mia123)
Hello, would 1/4 x2 multiplied by x2=1/4 x4?
Not sure what you're asking, unless you mean , in which case you're right .

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