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# C1 Mathematics Help watch

/ = square root

11. 1/28 - 2/63 + /7
13. 3/80 - 2/20 + 5/45
15. /12 + 3/48 + /75

3. Does that help at all?
4. (Original post by BJack)

Does that help at all?
No lol... well i got through other sums, but these one... nay!!
5. (Original post by Xaraaa)
No lol... well i got through other sums, but these one... nay!!
Look at number 11.

How else could you write ?
6. 11: and

For 13, try putting it terms of and for 15, try putting it in terms of .
7. (Original post by Xaraaa)
/ = square root

11. 1/28 - 2/63 + /7
13. 3/80 - 2/20 + 5/45
15. /12 + 3/48 + /75

so is question 11. - 2 + ?

for starters we know = X
2 = 2 X ( x )

these simplify to 2 - 6 + = -3 ..i think

sorry my latex isnt too good!

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Updated: November 16, 2008
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