Maths year 11

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    (Original post by z_o_e)
    Can you give one more example similar to this just different numbers please.

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    I'll post some more, but finish the question first. You've done the hard part.
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    (Original post by RDKGames)
    I'll post some more, but finish the question first. You've done the hard part.
    Is that the percentage one?

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    (Original post by z_o_e)
    Is that the percentage one?

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    Yeah move onto part b with the percentages.
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    (Original post by RDKGames)
    Yeah move onto part b with the percentages.
    How would I do that ;/

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    (Original post by Lucky10)
    Best advice i could give DO PAST PAPERS its the best way to get better a maths. Any topics you dont get use sites like mathswatch.
    I agree with this.As this is what I did and I went from a C in year 10 to an A* in year 11. Mathswatch is a godsend from heaven and I owe my A* to it
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    (Original post by z_o_e)
    How would I do that ;/

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    Well look at what part b is asking for. You first need to find the area of the triangle before applying a certain percentage.
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    (Original post by RDKGames)
    Well look at what part b is asking for. You first need to find the area of the triangle before applying a certain percentage.


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    No calculator please.
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    (Original post by RDKGames)
    No calculator please.


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    Second line doesn't make sense. Try again. Expand the brackets.
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    (Original post by RDKGames)
    Second line doesn't make sense. Try again. Expand the brackets.
    As in this way or do you mean

    2 root 5 minus 18 root 5?

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    (Original post by z_o_e)
    As in this way or do you mean

    2 root 5 minus 18 root 5?

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    Nope. Don't tell you forgot how to expand brackets with surds...
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    (Original post by RDKGames)
    Nope. Don't tell you forgot how to expand brackets with surds...
    Nooo I remember I was just unsure!



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    (Original post by RDKGames)
    Nope. Don't tell you forgot how to expand brackets with surds...


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    Yep. Collect the terms now.
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    (Original post by RDKGames)
    Yep. Collect the terms now.
    I know it's a bit dodgy the second ones

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    (Original post by RDKGames)
    Yep. Collect the terms now.
    8+ 11-2 root 5?

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    The  2 - 2 \sqrt5 is not correct, because  2 \times -2\sqrt5 = -4\sqrt5 , not  2 - 2\sqrt5

     (2 + \sqrt5)(9-2\sqrt5) = (2\times9)+(2\times-2\sqrt5)+(9\times\sqrt5)+(\sqrt5  \times-2\sqrt5) = 18 -4\sqrt5 + 9\sqrt5 - 10

    Now you need to collect like terms.
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    (Original post by K-Man_PhysCheM)
    The  2 - 2 \sqrt5 is not correct, because  2 \times -2\sqrt5 = -4\sqrt5 , not  2 - 2\sqrt5

     (2 + \sqrt5)(9-2\sqrt5) = (2\times9)+(2\times-2\sqrt5)+(9\times\sqrt5)+(\sqrt5  \times-2\sqrt5) = 18 -4\sqrt5 + 9\sqrt5 - 10

    Now you need to collect like terms.
    Do I not multiply them?

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    (Original post by K-Man_PhysCheM)
    The  2 - 2 \sqrt5 is not correct, because  2 \times -2\sqrt5 = -4\sqrt5 , not  2 - 2\sqrt5

     (2 + \sqrt5)(9-2\sqrt5) = (2\times9)+(2\times-2\sqrt5)+(9\times\sqrt5)+(\sqrt5  \times-2\sqrt5) = 18 -4\sqrt5 + 9\sqrt5 - 10

    Now you need to collect like terms.
    What do you mean like terms? Do I add all the surds up from each bracket?

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