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# Maths year 11 Watch

1. (Original post by RDKGames)
Correct number but wrong sign Notice that you are multiplying negative by a negative there so the answer must be a positive. Other than that, you have now expanded both brackets. Refer back to the Pythagorean theorem and see what you need to do with the two answers you just got.

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2. (Original post by z_o_e)
How's this?

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is not . The 101 is correct.
3. (Original post by RDKGames)
is not . The 101 is correct.
So is that it,

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4. (Original post by z_o_e)
So is that it,

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Well no, I just said one of your calculations is wrong.
5. (Original post by RDKGames)
Well no, I just said one of your calculations is wrong.
I got 36root5

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6. (Original post by z_o_e)
I got 36root5

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Well, technically MINUS 36root5. But yeah you got there. Now continue on with the first part, nearly done.
7. (Original post by RDKGames)
Well, technically MINUS 36root5. But yeah you got there. Now continue on with the first part, nearly done.
I got this

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8. (Original post by RDKGames)
Well, technically MINUS 36root5. But yeah you got there. Now continue on with the first part, nearly done.

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9. Nope nope nope. You are getting confused.

You worked out what and are because you expanded the required brackets for the side lengths, so just add them together. What you've done right there is which doesn't make sense. Also, don't use the calculator because it will only gives out decimals which are not asked for.
10. (Original post by RDKGames)
Nope nope nope. You are getting confused.

You worked out what and are because you expanded the required brackets for the side lengths, so just add them together. What you've done right there is which doesn't make sense. Also, don't use the calculator because it will only gives out decimals which are not asked for.

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11. Nope. Simplify it down,
12. (Original post by RDKGames)
Nope. Simplify it down,

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13. Yep! So since the length of the hypotenuse, c, is followed by , you can now find its length, and you will have it in the required form that part a asks for. State the values of a and b once you have done this.
14. (Original post by RDKGames)
Yep! So since the length of the hypotenuse, c, is followed by , you can now find its length, and you will have it in the required form that part a asks for. State the values of a and b once you have done this.
I didn't quiet get that

State the values of a and b?

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15. (Original post by z_o_e)
I didn't quiet get that

State the values of a and b?

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You know that so how can we go about finding c itself? What do we do to both sides? Once you have done this, you can tell what the values of a and b are.
16. (Original post by RDKGames)
You know that so how can we go about finding c itself? What do we do to both sides? Once you have done this, you can tell what the values of a and b are.
Divide both sides :/ not sure

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17. (Original post by z_o_e)
Divide both sides :/ not sure

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Square root both sides.
18. (Original post by RDKGames)
Square root both sides.

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19. So since it is now in the form you can state what the values of a and b are.
20. (Original post by RDKGames)
So since it is now in the form you can state what the values of a and b are.
Can you give one more example similar to this just different numbers please.

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Updated: December 10, 2016
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