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# Maths year 11

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1. (Original post by 34908seikj)
Use pythagorus

On my phone ( came out in latex

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2. (Original post by z_o_e)
On my phone ( came out in latex

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Sorry Will fix it now.
3. (Original post by 34908seikj)
Use pythagorus
*Pythagoras.
4. (Original post by 34908seikj)
Sorry Will fix it now.
I did this now as well

I think it's right.

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5. (Original post by B_9710)
*Pythagoras.
Sorry babe

(Original post by z_o_e)
On my phone ( came out in latex

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Try and finish it from here
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6. (Original post by z_o_e)
A bit stuck.

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a=x, b=2x. Just plug this in and find c.
7. (Original post by z_o_e)
I did this now as well

I think it's right.

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I got 8.5, but what you did was right.
8. (Original post by 34908seikj)
I got 8.5, but what you did was right.
I just don't get this!
Never did this before.

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9. (Original post by 34908seikj)
I got 8.5, but what you did was right.
Got this!!

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10. (Original post by z_o_e)
I just don't get this!
Never did this before.

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Okay, split it up.

You have √5 * √x^2 = 25

The √x^2 cancel out which leaves you with x

Now you have x√5 = 25

Divide by √5 and rationalise the denominator

So it will be x = 25/√5 -----> x = 25√5/5

Which leaves you with x = 5√5
11. (Original post by z_o_e)
Got this!!

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You would still have x√5 not 5x since you can rewrite it as √5 * √x^2 = 25

Now the square cancels out the square root so you are left with √5 * x = 25

Which is the same as x√5 = 25
12. (Original post by 34908seikj)
I got 8.5, but what you did was right.
My answer from yesterday gives 8.56...
13. (Original post by B_9710)
My answer from yesterday gives 8.56...
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Then I rounded incorrectly
14. (Original post by 34908seikj)
You would still have x√5 not 5x since you can rewrite it as √5 * √x^2 = 25

Now the square cancels out the square root so you are left with √5 * x = 25

Which is the same as x√5 = 25

But I don't understand the last square root stuff.

Then I'll do a similar question to this "

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15. (Original post by z_o_e)

But I don't understand the last square root stuff.

Then I'll do a similar question to this "

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.
so
so .
16. (Original post by z_o_e)

But I don't understand the last square root stuff.

Then I'll do a similar question to this "

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17. (Original post by 34908seikj)
Spoiler:
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Too hard (
I think I should leave this question.

I don't understand surds and squares maybe I need to learn them in order to understand this?
18. (Original post by z_o_e)
Too hard (
I think I should leave this question.

I don't understand surds and squares maybe I need to learn them in order to understand this?
Yes. Surds are super simple once you get the hang of them.
19. (Original post by 34908seikj)
Yes. Surds are super simple once you get the hang of them.
I need an introduction haha I know a bit of this
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20. (Original post by z_o_e)
I need an introduction haha I know a bit of this
There are very simple rules you need to follow to answer all of these questions.
and also
.

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